Sadly, Dr. Aihua ZHANG is leaving the group for family reasons. Aihua was one of the first members who joined me to build up the group. He has contributed so much to the group, not only in developing the new calcium model allowing us to simulate calcium-permeating ion channels, but also in helping group members in so many different ways. It has been a great pleasure to work with Aihua. We wish him all the best in every aspect of the future.