ST Xinghua (002109.SZ) subsidiary Yushen Energy completed its annual maintenance plan and resumed operations.

ST Xinghua (002109.SZ) announced that its holding subsidiary Shaanxi Yanchang Petroleum Yushen Energy Chemical Co., Ltd. (referred to as Yushen Energy Chemical) conducted routine maintenance on June 2, 2026, in order to ensure the safe and stable operation of the production facilities in the later period. The maintenance was scheduled to last for 35 days. During the maintenance period, Yushen Energy Chemical replaced the catalyst of the ethanol carbonylation unit and carried out defect rectification and improvement on other facilities to enhance the performance and operational quality of the production equipment, ensuring safe, stable, long-lasting, efficient, and optimal operation of the facilities. As of the date of this announcement, Yushen Energy Chemical has completed all maintenance plans and fully resumed production operations on June 29, entering a stable operational state.