Wang Gang's investigation about the situation of the deceased Wang Xu's dinner yesterday is very clear.

Last night at 8 o'clock, Wang Xu and four colleagues drank together and ended at 1 o'clock in the morning.

"The four people who drank with Wang Xu have all been investigated. After drinking last night, the four returned home respectively. Two of them drove and two took a taxi."

"The earliest one arrived home was 1:20, and the latest was 1:40. We called the supervisors along the way.

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