Celestial Mountain's Five Grandmasters

After Wei Wuxian's death, many celebrated but some mourned for their loved ones but they didn't know the truth or don't need to know. The terrifying truth that would make them kneel down on their knees and beg for forgiveness from the said person.

One day...

All of the major Clans such as the Lan, Jiang, Nie, and the Jin were invited to Celestial Mountain with a mysterious letter that was folded in a paper crane.

Each of them was very surprised but took the opportunity to want to know the Mountain Master once they arrived.

But...

That was just the start of the truth being revealed and being exposed. (I mean Nie Huaisang)

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Wei Wuxian died at the age of 18, 4 years than it supposes to be.
Lan Wangji is 1 year older than Wei Wuxian.