The IEA-EBC Annex 85 subtask leader Online Workshop was held on November 3rd, 2021 at Beijing, using ZOOM meeting room. Present at the Meeting were the subtask leaders of Annex 85. The meeting was opened by Associate professor Xiaoyun Xie, introduced the updated participation and management of each subtask. The meeting aims to give the brief progress of each subtask and enhance the collaboration between the four subtasks. Subtask leaders exchanged the comments about the final reports of the project and discussed the time and agenda of next workshop in December.