According to the internet:
The default toast in China is gān bēi, which literally means 'dry cup'. Unlike in much of Europe, you will be expected to empty your cup after each toast is given, or at least give it your best effort.
lifestyle/food-drink/how-to-say-cheers-in-different-languages-1117824/
How to write it: 干杯 (gān bēi)
How to say it: gan bay
Summary: Lan QiRen drinks a toast... more or less.
It's bad enough, QiRen thought, that the meal was greasy, salty, and meat heavy. Now they were insisting on serving alcohol to everyone for toasts.
Even WuXian looked disapproving of that although he drank his own drink as soon as it was poured. Ah, QiRen thought, when WuXian set down his cup and reached immediately to take WangJi's as well: That was the rush.
He considered his own cup for a moment. He didn't like alcohol, it gave him a headache and he already had a headache from the meal. He put the cup down on the corner of his table, nearer to WuXian as a test. Wuxian paused for only a moment, before downing it as well and then returning the cup to QiRen's table.
His eyes, QiRen noticed never left the face of their host, even as he drank three cups of alcohol.
He only blinked when there were clinks of cups behind them, while QiRen turned to look. Lan disciples were better trained than to make such noises. They had set their full cups of alcohol at the corners of their tables as well. QiRen suppressed a wince. He had not been intending to set a precedent. WuXian laughed though. Laughed, stood up, bowed to their host, and then walked down the line of Lan disciples downing their drinks one after the other.
QiRen shared a short but appalled look with his nephew before WuXian returns to his seat between them, looking only slightly flushed from the drinks.
He can just hear WuXian's laughing whisper to WangJi, "I thought I was going to teach the juniors how to handle their alcohol, and here I've discovered you've already taught them your method!"