[CPDC] Subsidiary Zhao Xin Chemical announces setting the merger baseline date with the parent company

1. Date of original announcement: 2025/12/11 2. Summary of original announcement: The merger case was approved and originally set for Feb 1, 2026. It was adjusted to April 1, 2026, and later delayed again due to operational procedures. 3. Reason for change and main content: In coordination with relevant operations and progress, the merger baseline date is set for June 1, 2026. 4. Impact on company finance and business after change: None. 5. Other matters to be specified: None.