I haven't heard of a bug in that version so far, that could keep you from progressing.
If that is an option for you, then you might try it. That's up to you. I am sorry you are having trouble with the game, but I am not sure how I am able to provide any help. This bug has not been reported before as far as I know and I cannot provide any support for the chinese version of the game, I am sorry.
(I'm gonna laugh at my stupidity.)The sample should be taken from the table on the left, where there are a few glasses of milk. Before, I always interacted with other locations, so I didn't find what I was really looking for. Then I searched for a long time on the table on the right. After reading your comment, I decided to look for it carefully. Now I realize that I am so stupid, hahahaha