The annex was still in the preparation phase so no research has started within the subtasks. 53 attended the third preparation workshop April 19-22, and 22 countries are interested in participation. So, there is a steady increasing interest in participating in the annex. The workshop was due to the Covid 19 situation online. Due to the time difference between Berkeley and Hong Kong a timeslot of 3 hours (15:00-18:00 CEST) was each day scheduled for discussing the workplans of the four subtasks. Definition of research questions of common exercises have begun.