Take great pains: appointment. Describe the pain.
Zhengzheng was originally a dialect in Jiangsu and Zhejiang provinces. Pretend it really happened. More refers to grandstanding, which seems great.
Being serious is pretending, as if it really happened.
Evil spirits originally referred to evil spirits. Later used to describe a very vicious person.
Erase: logout. Draw a stroke and it will all be erased. Metaphor rashly denies all achievements and advantages.
Great humor destroys the beauty. Metaphor spoils fun. To "spoil everyone's fun."
Do your best means do your best.
It seems to be true. Often used to describe making a mountain out of a molehill or putting on airs.