C1211 The Battery Pot
If they wanted to break the agreement, they had to have the ability to do so. To the Cattle Country, they didn't have the ability to do so.
After leaving the Cattle Country, there were still other countries in the Han Country that could choose to do so. Other countries did not have it, but Qin Guan had his own weapon graveyard. The advanced information could be exchanged at any time. So..