Su Yang was unaware that Liao Yuxuan and the others had ambushed these Japanese. In fact, he couldn't be bothered with these matters.
He had let these Japanese go because the Sect Master had given him the information he wanted, and by the promise, he had to release them. Actually, Su Yang was utterly unwilling to let these Japanese go, wishing he could have killed them all.
So even if he knew about Liao Yuxuan's ambush, Su Yang would not have cared.
A night passed without incident, and Zhao Ping'an returned to the hospital to take care of his family.
After this event, Zhao Ping'an had essentially gained complete control over Liuan City.
The Six Great Families had long ago sent people to seal off the entire hospital, surrounding it so tightly that no one could enter.
In fact, at this time, who would dare to do anything to Zhao Ping'an? The Six Great Families' actions were, frankly, to curry favor with Zhao Ping'an.