for the new Chairman of Bishan Xiangqi Club, we need at least say 1.5 years if in the fast path ...

6 months as active member so that any EXCO member can observe and nominate to join EXCO
6 months as active EXCO member so that Chairman, deputies and other EXCO members can observe and nominate as deputy
6 months as active deputy so that the EXCO could have the confidence and propose to C.C. for the change of Chairman.