The China Memo

15. The Glass Backbone: How China's Optical Fiber Feeds the AI Era

The AI conversation is dominated by chips. But before any compute can do useful work, data has to move — through thin strands of glass called optical fiber. And China makes more of it than the rest of the world combined: over half of global fiber and cable, around 65 percent of fiber-optic components, and a single Wuhan cluster called Optics Valley that accounts for roughly a quarter of the international market. This episode traces the arc from China's first optical fiber, pulled in a Wuhan lab in 1976, to the glass backbone now feeding China's AI infrastructure through the "East Data, West Computing" program. It covers the strategic upstream — preforms, which carry 70 percent of industry profits and where China has driven self-sufficiency above 85 percent — and the national champion YOFC. The closing question: whether dominating the physical layer of AI carries the same strategic leverage as dominating the chips, or whether the glass, unlike leading-edge semiconductors, is essential but replicable. REFERENCES China Optics Valley — "China's Optical Fiber and Cable Industry Overview." http://www.chinaopticsvalley.com/2022-09/02/c_808066.htm Wuhan Government — "Optics Valley East Lake High-Tech Zone." https://www.wuhan.gov.cn/wwwz/ywwz_1/H_1/NWP/202211/t20221104_2084729.shtml Grand View Research — "China Fiber Optics Market Outlook." https://www.grandviewresearch.com/horizon/outlook/fiber-optics-market/china IBISWorld — "Optical Fiber and Cable Manufacturing in China." https://www.ibisworld.com/china/industry/optical-fiber-and-cable-manufacturing/611/ ResearchInChina — "China Optical Fiber Preform Industry Report." http://www.researchinchina.com/Htmls/Report/2019/11625.html China Daily — "YOFC: Global Market Leader in Optical Fiber and Cable." https://www.chinadaily.com.cn/a/202311/07/WS6549991ba31090682a5eccf7.html Chinese Academy of Engineering — "Active Optical Fiber Materials and Strategic Technologies." https://www.engineering.org.cn/sscae/EN/10.15302/J-SSCAE-2024.03.017 Corning — "Optical Fiber Makes Artificial Intelligence Possible." https://www.corning.com/worldwide/en/the-progress-report/crystal-clear/optical-fiber-makes-artificial-intelligence-possible VSOL — "Why Fiber Network Is the Backbone of the AI Era." https://www.vsolcn.com/blog/why-fiber-network-is-the-backbone-of-ai-era.html Fiber Broadband Association — "The Virtuous Circle of Fiber and AI." https://fiberbroadband.org/2025/07/11/the-virtuous-circle-of-fiber-and-ai/ FiberLight — "Synergies at Play: AI and Fiber Optics." https://www.fiberlight.com/blog/synergies-at-play-ai-and-fiber-optics/ IFM Investors — "Beyond Data Centres: Could Fibre Optic Networks Bridge the AI Divide." https://www.ifminvestors.com/news-and-insights/thought-leadership/beyond-data-centres-could-fibre-optic-networks-bridge-the-ai-divide/ FOB Sourcify — "Fibre Company Road to China Light." https://www.fobsourcify.com/fibre-company-road-to-china-light/

14. China's Second Great Grid: The Hardware Behind Net Zero and AI

China has crossed an inflection point in its energy transition: the binding constraint is no longer whether it can manufacture renewable energy equipment, but whether its grid infrastructure can absorb, transport, and time-shift what that equipment produces. This episode maps the build-out — the pumped-storage hydro fleet, the battery additions, the UHV transmission lines, and the co-location of data centres with renewable energy clusters — and identifies the structural stakeholders: who benefits from the infrastructure layer, who bears the timing risk from weak market design, and what the second-order commercial shift looks like as value migrates from commodity hardware toward grid equipment, power electronics, and storage management software. Three forward-looking markers: curtailment rates, battery utilisation hours, and the pace of electricity market reform. REFERENCES   Energy Connects — "China Accelerates Grid Projects to Keep Up with Renewables Boom." https://www.energyconnects.com/news/utilities/2024/june/china-accelerates-grid-projects-to-keep-up-with-renewables-boom/ China.org.cn — "China's New Energy Storage Capacity." http://www.china.org.cn/business/2024-08/01/content_117343807.htm World Economic Forum — "China Adding More Renewables to Grid." https://www.weforum.org/stories/2025/12/china-adding-more-renewables-to-grid/ English.www.gov.cn — "Pumped-Storage Hydro Targets and Approvals." https://english.www.gov.cn/news/202409/03/content_WS66d67fa9c6d0868f4e8ea836.html Carbon Brief — "How China Became the World's Leading Market for Energy Storage." https://www.carbonbrief.org/qa-how-china-became-the-worlds-leading-market-for-energy-storage/ Energy Storage News — "China Aims for Energy Storage Installations Equivalent to Today's Global Capacity by 2027." https://www.energy-storage.news/china-aims-for-energy-storage-installations-equivalent-to-todays-global-capacity-by-2027/ Bloomberg — "China Aims to More Than Double Energy Storage Capacity by 2027." https://www.bloomberg.com/news/articles/2025-09-12/china-aims-to-more-than-double-energy-storage-capacity-by-2027 ScienceDirect — "Co-optimising Storage and Demand Response in China's 2050 Power System." https://www.sciencedirect.com/science/article/abs/pii/S0301479724037915 Wikipedia — "Renewable Energy in China." https://en.wikipedia.org/wiki/Renewable_energy_in_China CNESA — "China's First Grid-Forming Wind-Solar-Storage Integrated System." http://en.cnesa.org/latest-news/2025/10/13/chinas-first-grid-forming-wind-solar-storage-integrated-system-for-substations-put-into-operation

13. China's Renewables and the 2035 System Bet

In 2024, China spent close to 940 billion dollars on clean energy — nearly matching what the entire world spent on fossil fuels that same year — and has now installed more than 1.8 terawatts of wind and solar capacity. This episode traces the policy loop that built that scale, from the 2005 Renewable Energy Law through the manufacturing dominance phase, to the 15th Five-Year Plan's pivot toward system integration: transmission corridors, market-based pricing, and storage. Buried in the plan's technical annexes is an implied 2035 target of over 3.6 terawatts of wind and solar and roughly 4,700 gigawatts of total non-fossil capacity — effectively doubling current levels within a decade. The episode examines three risks that could push that arc off course: transmission and storage lagging capacity growth, subsidy-transition friction including price cannibalization in the merchant power market, and coal retrofit economics proving stickier than planned. It closes by identifying three markers worth tracking through 2030 — annual capacity additions, transmission corridor progress, and China's export position under global trade friction. REFERENCES Renewable Institute — "China's Clean Energy Boom: 940 Billion of Investments Power a Greener Future." https://www.renewableinstitute.org/chinas-clean-energy-boom-940-billion-of-investments-power-a-greener-future/ [https://www.renewableinstitute.org/chinas-clean-energy-boom-940-billion-of-investments-power-a-greener-future/] World Economic Forum — "China Adding More Renewables to Grid." https://www.weforum.org/stories/2025/12/china-adding-more-renewables-to-grid/ [https://www.weforum.org/stories/2025/12/china-adding-more-renewables-to-grid/] PV Magazine — "China Five Year Plan Deepens Shift Toward Renewables." https://www.pv-magazine.com/2026/03/18/china-five-year-plan-deepens-shift-toward-renewables-system-focus/ [https://www.pv-magazine.com/2026/03/18/china-five-year-plan-deepens-shift-toward-renewables-system-focus/] WindTech International — "China's 15th Five Year Plan Sets Direction for Renewables." https://www.windtech-international.com/industry-news/chinas-15th-five-year-plan-sets-direction-for-renewables-expansion-and-wind-growth-to-2030 [https://www.windtech-international.com/industry-news/chinas-15th-five-year-plan-sets-direction-for-renewables-expansion-and-wind-growth-to-2030] Carbon Brief — "What Does China's 15th Five Year Plan Mean for Climate Change." https://www.carbonbrief.org/qa-what-does-chinas-15th-five-year-plan-mean-for-climate-change/ [https://www.carbonbrief.org/qa-what-does-chinas-15th-five-year-plan-mean-for-climate-change/] E3G — "China's 15th Five Year Plan: A Green Transition Anchored in a Globally Oriented Growth Strategy." https://www.e3g.org/news/china-s-15th-five-year-plan-a-green-transition-anchored-in-a-globally-oriented-growth-strategy/ [https://www.e3g.org/news/china-s-15th-five-year-plan-a-green-transition-anchored-in-a-globally-oriented-growth-strategy/] Forbes — "Top 5 Trends to Watch in Chinese Energy During 2026." https://www.forbes.com/sites/wesleyhill/2026/01/05/top-5-trends-to-watch-in-chinese-energy-during-2026/ [https://www.forbes.com/sites/wesleyhill/2026/01/05/top-5-trends-to-watch-in-chinese-energy-during-2026/] ABC Australia — "China Unveils Five Year Plan for Green Energy Renewables." https://www.abc.net.au/news/2026-03-17/china-unveils-five-year-plan-for-green-energy-renewables/106448728 [https://www.abc.net.au/news/2026-03-17/china-unveils-five-year-plan-for-green-energy-renewables/106448728] Power Technology — "China Renewable Energy Subsidies." https://www.power-technology.com/news/china-renewable-energy-subsidies/ [https://www.power-technology.com/news/china-renewable-energy-subsidies/] Reuters — "Investors Bet Iran War Will Boost Chinese Renewables Demand." https://www.reuters.com/sustainability/boards-policy-regulation/investors-bet-iran-war-will-boost-chinese-renewables-demand-2026-03-24/ [https://www.reuters.com/sustainability/boards-policy-regulation/investors-bet-iran-war-will-boost-chinese-renewables-demand-2026-03-24/] IISD — "Public Finance for Renewable Energy in China." https://www.iisd.org/system/files/publications/public_finance_renewable_energy_china.pdf [https://www.iisd.org/system/files/publications/public_finance_renewable_energy_china.pdf] Climate Cooperation — "China's 15th Five Year Plan Recommendations." https://climatecooperation.cn/climate/chinas-15th-five-year-plan-recommendations-set-out-chinas-energy-and-climate-priorities/ [https://climatecooperation.cn/climate/chinas-15th-five-year-plan-recommendations-set-out-chinas-energy-and-climate-priorities/] People's Daily — China Renewable Energy System Overview. https://en.people.cn/n3/2026/0302/c98389-20430326.html [https://en.people.cn/n3/2026/0302/c98389-20430326.html]

12. A, B, H, N: The Chinese Share Classes Explained

The same Chinese company — ICBC, PetroChina, any major dual-listed name — can trade at materially different prices in Shanghai and Hong Kong on the same day. That A-H premium is not a pricing error. It is a structural feature of how China's equity markets are segmented. This episode explains the four main Chinese share classes — A, B, H, and N — covering where each is listed, who trades it, what kind of companies you find inside it, and how each behaves differently from the others. A companion to our episode on Chinese stock indices. Between the two, you have the map and the terrain. REFERENCES LSEG / FTSE Russell — "Guide to Chinese Share Classes." https://www.lseg.com/content/dam/ftse-russell/en_us/documents/policy-documents/guide-to-chinese-share-classes.pdf Investopedia — "Differences Between H-Shares and A-Shares." https://www.investopedia.com/ask/answers/062315/what-are-differences-between-hshares-and-ashares-chinese-and-hong-kong-stock-exchanges.asp Invesco — "China ETF Share Classes Infographic." https://www.invesco.com/content/dam/invesco/emea/en/pdf/China-etf-infographic-EN.pdf Sinorbis — "Understanding the Chinese Stock Market." https://www.sinorbis.com/understanding-the-chinese-stock-market MSCI — "MSCI China Index." https://www.msci.com/indexes/index/302400 ScienceDirect — "A-Share and B-Share Volatility Study." https://www.sciencedirect.com/science/article/abs/pii/S1059056003000030 ScienceDirect — "A-H Share Premium Study." https://www.sciencedirect.com/science/article/abs/pii/S104402832100017X B2Prime — "H-Shares vs A-Shares: What Are They and How Do They Differ." https://b2prime.com/news/h-shares-vs-a-shares-what-are-they-and-how-do-they-differ Monmouth University — "Valuation Differential Between Class A and B Shares." https://www.monmouth.edu/directory/documents/2018/09/the-valuation-differential-between-class-a-and-b-shares-country-risk-in-the-chinese-stock-market.pdf/ Bogleheads Forum — China A-Share Investor Base Discussion. https://www.bogleheads.org/forum/viewtopic.php?t=185827 YouTube — H-Shares vs A-Shares Explainer. https://www.youtube.com/watch?v=fWSbUfo96_c

11. National Reading Week: China Wants you to Read More and Scroll Less

On April 20, 2026, China launched its first National Reading Week. Official framing positions it as a cultural initiative — books, libraries, literacy — with no mention of smartphones or screens. This episode argues that framing is accurate but incomplete. Reading Week is the positive-reinforcement arm of a broader state effort to recalibrate how Chinese people spend their attention: the same policy environment that includes school phone bans, gaming time limits for minors, and university research on smartphone harm. Three markers to watch: whether reading metrics actually move over successive Reading Week cycles, whether the positive and restriction tracks begin to converge in policy language, and how digital reading is positioned within the framework. #China #ChinaEconomy #ChinaBusiness #GlobalMacro #EmergingMarkets REFERENCES * Xinhua — "China Sets Annual National Reading Week Starting from 2026." https://english.news.cn/20260420/0332d65b87004997aec5d3fa209eee38/c.html [https://english.news.cn/20260420/0332d65b87004997aec5d3fa209eee38/c.html] * Xinhua — "Record Number of Enterprises in Ice and Snow Tourism." https://english.news.cn/20260106/b983b69b049f4873b98f8ce0bac608e5/c.html [https://english.news.cn/20260106/b983b69b049f4873b98f8ce0bac608e5/c.html] * China SCIO — "First National Reading Week and 5th National Conference on Reading." http://english.scio.gov.cn/topnews/2026-04/21/content_118449063.html [http://english.scio.gov.cn/topnews/2026-04/21/content_118449063.html] * Bastille Post — "China Sets Annual National Reading Week." https://www.bastillepost.com/global/article/5305195-china-sets-annual-national-reading-week-starting-from-2026 [https://www.bastillepost.com/global/article/5305195-china-sets-annual-national-reading-week-starting-from-2026] * China Daily — "National Reading Promotion Regulations in Force February 2026." https://www.chinadaily.com.cn/a/202604/20/WS69e64707a310d6866eb447d0.html [https://www.chinadaily.com.cn/a/202604/20/WS69e64707a310d6866eb447d0.html] * China Daily HK — "China Library Infrastructure: 3,248 Public Libraries by End 2024." https://www.chinadailyhk.com/hk/article/626634 [https://www.chinadailyhk.com/hk/article/626634] * Global China Daily — "China Reading Week Activities." http://global.chinadaily.com.cn/a/202604/20/WS69e5e828a310d6866eb44708.html [http://global.chinadaily.com.cn/a/202604/20/WS69e5e828a310d6866eb44708.html]China.org — "Nationwide Reading Part of 15th Five-Year Plan." http://www.china.org.cn/2026-04/20/content_118447717.shtml [http://www.china.org.cn/2026-04/20/content_118447717.shtml]People's Daily — "More Than Gold: China's Ice and Snow Sports Boom." https://en.people.cn/n3/2026/0420/c90000-20448289.html [https://en.people.cn/n3/2026/0420/c90000-20448289.html] * Global Times — "China's Silver Economy Upgrade Fuels Rapid Rise of Elderly-Friendly Toys." https://www.globaltimes.cn/page/202602/1355101.shtml [https://www.globaltimes.cn/page/202602/1355101.shtml]