Many people in history have kept diaries.
And not a few have been passed down; Tang Xian himself also writes some notes.
But mostly, his notes are personal insights.
For instance, how to interact with snakes, which might be tastier between fox meat and snake meat.
Techniques for taming a "diseased damsel," cultivation of straight men, or upbringing insights for a six-year-old girl.
All are insights lacking substance.
Diaries that purely record events,
To Tang Xian, seem like a waste of time because while every day might come with its interesting feelings, not every day necessarily comes with an interesting life. Thus, chronicling daily accounts really seems like a waste of time.
To use a phrase from Jiang Wen, an ancient renowned director:
How could adults tell the truth in their diaries?
Hence, on some social networking services, like Moments, Friend Circles, blogs, and such, you should only believe half of what you read, and that's why there are often such reversals.