To protect the investors’ rights and interests, China Oilfield Services Limited (“COSL” or the “Company”; stock code of HKEX: 2883; stock code of SSE: 601808) will hold a conference call at 16:30 on Thursday, October 30, 2025 to discuss the results for the third quarter. The management of the Company is inviting you to participate in the conference.   

The time of the conference call may be slightly delayed, which depends on the actual time of releasing Q3 results. The consecutive interpretation between Mandarin and English will be provided in the Q&A session. If you would like to participate in the conference, please send an email to us at SPRG_COSL@sprg.com.hk or contact us at(852) 2864 4890、（852）2114 2825、（852）2864 4894.