Group 1 - The core viewpoint of the article highlights the recovery of Wanhua Chemical's MDI production capacity, which is crucial for supplying raw materials to downstream industries such as home appliances, construction, and automotive during the upcoming production peak season [2] - Wanhua Chemical currently has an MDI production capacity of 3.8 million tons per year and TDI capacity of 1.11 million tons per year, maintaining its leading position in the industry. After the completion of the Fujian base expansion project in 2026, the total MDI capacity will reach 4.5 million tons [3] - The successful resumption of a 1 million tons/year ethylene unit after a 7-month upgrade marks a significant transition from traditional propane cracking to ethane cracking, enhancing the flexibility of raw material sourcing [3][4] Group 2 - The domestic ethylene industry is accelerating its transition towards lighter and more diversified raw materials, with policies encouraging the exploration of ethane and propane cracking processes to optimize raw material structures and enhance competitiveness [4] - The newly implemented dual-feed flexible feeding system allows the upgraded unit to switch between ethane and propane based on market conditions, effectively mitigating supply chain risks associated with reliance on a single raw material [4]