SIASUN(SZ:300024) Xin Lang Cai Jing·2026-01-09 02:40Group 1 - The core viewpoint of the news highlights the performance of the chemical industry, particularly the active role of PEEK materials in aerospace and lithium battery projects announced by several listed companies in early 2026 [1][2] - The China Securities Subdivision Chemical Industry Theme Index (000813) shows mixed performance among its constituent stocks, with Jinfa Technology (600143) leading with a 9.99% increase, while Luxi Chemical (000830) experienced the largest decline [1] - The chemical ETF (159870) is closely tracking the China Securities Subdivision Chemical Industry Theme Index, which consists of seven sub-indices reflecting the overall performance of listed companies in related sectors [2] Group 2 - PEEK and its carbon fiber reinforced composite materials (CF/PEEK) are crucial in the aerospace sector, replacing metals in aircraft components to significantly reduce weight [1] - Specific applications of PEEK in aerospace include electrical harness clamps in the Airbus A350XWB, turbine engine seals, bearing retainers, and components in fuel systems, showcasing its ability to withstand high temperatures and complex stresses [1] - The top ten weighted stocks in the China Securities Subdivision Chemical Industry Theme Index as of December 31, 2025, include Wanhua Chemical (600309) and Yalv Co. (000792), collectively accounting for 45.31% of the index [2]