For the Party B cases not buying signature of party A, the minutes of the negotiated take effect from the date of Party A and Party B receives the token and expires when Party A to handed token to party B.
For the Party B cases not buying signature of party A, the minutes of the negotiated take effect from the date of Party A and Party B receives the token and expires when Party A to party B to token right-handed.
Party B for the cases not buying signature of party A, the minutes of the negotiated take effect from the date of Party A and Party B receives the token and expires khi Party A to party B. token handed to