They hit a snag!
After the Moon-Watching Sect wiped out the Sky-splitting Sword Sect, they ruthlessly pursued the Myriad Gold Pavilion, not only slaughtering countless people but also seizing control of all Myriad Gold Pavilion's branches in the Western Wastes—even taking over the loans they had issued!
This infuriated the Myriad Gold Pavilion. Had the Western Wastes not been so remote, and had there not been restrictions on Nascent Soul experts traveling there, with no Divine Spirit True Venerables able to enter, they would have long since mobilized an army to flay and gut Meng Yu like a rabbit.
The Myriad Gold Pavilion fumed with suppressed rage. They even went so far as to assist the Eternal Night Palace against Meng Yu, but they forgot that the action of forces is mutual!
After taking control of Sleepless City, Meng Yu did not raid those legally operating Sects; however, he did not spare the Myriad Gold Pavilion, decisively closing their shops and arresting people!