Yu Ren Dong wrote on Sat, Sep 17, 2011 02:41 AM UTC:
The Pawn (Chu) does not have a double initial step, with the exception of
the pawn before the queen.
The first move pawn as a double initial step is obligatory, but White
player would choose the pawn before the queen or king:
1. If White choose the pawn before the queen, Black must also choose the
pawn before the queen.
2. If White choose the pawn before the King, Black must also choose the
pawn before the King.
Please see
http://www.nmgqipai.com/mengguxiangqi/mengguzuchuantongtiyu-mengguxiangqi.html