•Heyun's age is 25. Li Shiqing is 20. 20+25= 45
•Heyun's prison number on the dream was 0025.
•The total number of cycles were 25.
•The last episode aired on Jan 25.
•The bus number is 45. The explosion was at 1:45 pm.
•The driver was 45 years old when he joined the bus company.
•The compensation for Wang Mengmeng's accident was 450,000.
3. Xiao Heyun indeed has a sharp memory and it was in fact shown at beginning episodes. When they first called the police, he knows the bus plate number that people usually don't care about. He also remembered Lu Di's long name easily.
4. Ma Guo Qiang's reaction when he was stopped from arguing with Heyun was to raise his hands and squat down, a common thing prisoners do inside the prison. This detail shows his imprisonment in the past.
5. Mengmeng's infinity hairpin, the symbol on the bus is a recycle sign. On Lu Di's hat, there was a infinity symbol and & "Reset" as well. The circular locations used in the drama also suggests that they are inside the loop.
6. It was mentioned that Lu Di's mom used to be a fan of Leslie Cheung (singer) and Sanmao (writer). Others said that she probably reacted that way upon seeing her son's diary was because both said popular figures committed suicide irl.
7. It was shown on Li Shiqing's resume that she was a graduate of the middle school Tao Yinghong used to teached at. Altho she graduated at 2016, it was possible that they have passed each other countless times without knowing it.
8. A hint that there were actually two bombers inside the bus. Even though the bomber used a right hand on two different scenes, the other one has a band aid in the middle finger while the other has none.
9. Xiao Heyun's game is filled with violence as he believes that game world should have no boundaries. If you search the number written on his profile, it will show that the picture on his WeChat was from GTA, a game with similar concept as his game.
10. "Pachelbel's Canon" the song used as the ringtone and the bomb's alarm is based on a principle called strict imitation (repetition of a melody in a polyphonic texture). Idk much about these but here's what I found on the internet haha.
11. Probably one of the details I love. The difference between Liu Yao's short shorts and Wang Mengmeng's long dress. They showed that a pervert is a pervert. It has nothing to do with what the woman is wearing!
12. Liu Yao and Shiqing sat on the same seat on Bus No 45. Liu Yao who chose to remain silent out of fear & Shiqing who saved everyone inside the bus (including clearing Wang Mengmeng's name) were both on the first seat near the second door.