TMOMPSS,a team which is dedicating to the study of the different modes of thinking of people from different Countries.

Your coordination will be appreciated much.
Please read the short story below, which was adapted from a true incident that took place in ancient China .

In AD 208，Mr. Caocao（C）led an army of 200 thousand soldiers assault Eastern Wu, which was a nation ruled by Mr Zhouyu (Z).
One day Z was spying on C's navy camps, and surprisingly he found that they were in battle array， strong and well disciplined. The attendants told him that the governor of the army was Caimao（Cm） and Zhangyun（Zy）.
It would be too difficult and formidable to resist the aggressors with those two people alive.
The next day, Jianggan（J），an old friend of Z who was in C's army then, came over to Z's. Z treated him with the utmost cordiality, saying that only friendship——instead of military affairs—— could be talked about during the banquet since they were old friends.
In the deep night, J felt hard to fall asleep while Z seemed to be drunk, sleeping soundly. J got up，and he saw the capitulation sent from Cm and Zy on Z's table.
If you are J, what would you decide to do then?