Join with previous membership:
Find in 个人中心(Personal Center) the column of 我退出的专委会(my previous Committee).
If you see the following identity of 正式会员(formal member), you do not need to operate.
If you fail to see the above status, which could be due to membership expiration, see below 国际中医药临床标准工作委员会, click 点击申请(click and apply) below 重新入会(Rejoin our Committee) to apply for rejoining our membership.
If you cannot see this button of 点击申请, you may also click 取消申请(Cancel application), and then apply again by following Step 2 mentioned above to apply again.