Knowing something cannot be done yet doing it anyway is not the act of a wise man.
Bingzhou is not the State of Qin's babysitter, and it will not unconditionally keep helping the State of Qin and the Ying clan.
The alliance between Qin and Bingzhou was formed only because the State of Qin unconditionally helped Bingzhou when Bingzhou was first established, and over the years, Bingzhou has long since repaid that favor in full.
Chapter 1008