Although Yan Qingsang was reluctant, the two quietly left Yun Tuo Mountain the next day. As for Yan Wanjun, shortly after Jiang Chen and Yan Qingsang left, he left a letter in his cave residence. He temporarily dismissed all personal stewards and disappeared alone from Yun Tuo Mountain.
When the Yan Family realized Yan Wanjun was missing, it was already several days later. The letter was discovered and immediately presented to the person in charge of Yun Tuo Mountain, Elder Liang.
Upon opening and reading it, Elder Liang was greatly shocked and only then realized that Supreme Elder Yan Wanjun had already left Yun Tuo Mountain. In the letter, Yan Wanjun even stated that he would leave the Yan Family and not meddle in the family's affairs for the short term. As for the reason, the letter only hinted at it vaguely.
Even with Elder Liang's insight, he couldn't deduce the true meaning behind the letter.