In China making noise with mouth when eating is considered respectful.
No it isn't. You can slurp noodles without being rude but they do not consider 'loud mouth noises' respectful.
https://ali.mk/posts/the-role-of-noises-in-chinese-dining-et...
https://www.reddit.com/r/China/comments/6w5hux/slurping_nood...
+ personal questions to real Chinese people.
First link: That is a Swedish robotics blog and the sources linked are just landing pages for Chinese tours or language lessons.
Second link: Where do they say that 'making loud mouth noises is a sign of respect'? They say 'people slurp noodles' which is exactly what I said.