well i don't know about every case ofcourse, but people of gilgit baltistan marry alot in xinjiang. but there were a few cases in 2005 and before of Afghan and pakistani pashton men marrying xinjiang chinese uyghur women and then after brining them home from china, they sold them to other people
although rare cases but i knew 3 people who had this happened to them.
uyghur xinjiang people are also conservative and bold just like people we have variety of in pakistan, not everyone is the same. i have 5 classmates who married with xinjiang women and they have marriages over 5 years till now. so in my personal experience with close friends and their friends i have not seen marriages failing.
i personally have had only one girlfriend from china, she is from Shenyang city liaoning china she is han converted to islam because she Read the meaning of Ayat Ul Kursi, she was facinated by it, she read the Quran herself and was convinced that it was the truth. we might get married this year. in 2019 i had a domestic agreement with her and her parents.
i guess Marriages with Uyghurs or central asians is just about the same as any international marriage. some uyghurs are conservative some pakistaniz are
its not the same in each case. very few marraiges fail in my opinion. if there is no visa or travel issue i don't think marriages would break with chinese people.
i have 2 friends who are married in Hong kong with chinese also. they have super cool looking kids. we kashmiriz and chinese Mix together to make beautiful babies