There were people who were happy with Happy having disappeared, but there were also some who were worried.
Since Class One Hall was unable to figure out Happy's whereabouts, they could be said to be full of uncertainty. They were unable to make up their mind about their next move.
They wanted to use the chance to attack Mu Clan and stop them in their development, but they were worried that Happy was not actually in Eternal Peace Temple but lurking around Beijing. Hence, not only did they not give the orders to mobilize their forces, a few of the higher ups were even held back in Beijing. They did not dare to readily leave it.
Even though they had dozens of branches, which meant that a group of really powerful players would need to fight hard for more than two hours before they could destroy the foundation of their headquarters, if they were too far away, they would not be able to take care of the headquarters.