As mentioned above, 11 teams can be in two days of 5 rounds without any change of 棋赛制度.
5 teams can be in one day of 2 rounds without any change of 棋赛制度.
So, if you have 10 teams (5 teams in Division A and 5 teams in Division B) can be in one day of 2 rounds without any change of 棋赛制度.
reproduced below : --
Method of Divisions A and B -- 1 Day Event
http://v15.huasing.org/bbs.php?B=123_10951092
Anyway, the few posts in the last 3 to 4 days just hope to improve the system so that more teams can join.
If it is too late to change the system, we just try to form team (tackle the issues of budget, duration and number of players) when the official letter is in.