This paper provides a comprehensive overview of the operational status of PetroChina's ethylene business in 2025. It systematically reviews the performance achievements of various production facilities concerning core indicators such as ethylene output, yield, and energy consumption. Moreover, it conducts an in-depth analysis of the achievements made in areas such as feedstock optimization, extended operational cycles, turnaround management, and technological upgrades. Furthermore, it defines the key tasks and implementation arrangements for PetroChina's ethylene business in 2026.