Jiangyin Chenggao Packaging Materials Co., Ltd. Non Calibration Parts Change Announcement Change Announcement Number: WXBGGG202505190002 The non calibration parts announcement (Project Number: WXCGXY202504220001) issued by our company on April 22, 2025, has been changed as follows: the deadline for quotation before type change is 08:00-24 on May 19, 2025, and 08:00-22 on May 26, 2025. The deadline for clarification before standardization is 07:23:27 on May 19, 2025, and 07:29:37 on May 26, 2025. Except for the above changes, the rest of the original announcement is still valid. Jiangyin Chenggao Packaging Materials Co., Ltd. May 19, 2025