Wanhua Chemical Group
Chinese specialty chemicals company (SZSE/SSE: 600309, HQ Yantai, Shandong; ~RMB 170B revenue); world's largest MDI (methylene diphenyl diisocyanate) producer — having surpassed Bayer/Covestro and BASF through aggressive capacity expansion over 20 years. Wanhua was founded in 1978 as Yantai synthetic resins factory (a state enterprise) and has grown through acquiring foreign technology licenses and building proprietary MDI production technology. Wanhua's MDI market share has grown from <5% in 2010 to approximately 35-40% of global MDI capacity by 2024. Wanhua was founded on the principle of 'import substitution' of foreign MDI — in the 1980s-90s, China had to import all MDI from BASF, Bayer, and Dow; today China (Wanhua + others) produces more MDI than it imports. Wanhua's competitive strategy mirrors CATL's in batteries and BYD's in EVs: take a technically complex chemical from Western producers, learn the technology (through licensing and reverse engineering), undercut on price, and become the global leader. Wanhua also produces TDI, propylene oxide, and specialty chemicals from its Yantai and Ningbo complexes.