Mail brides have many moral issues. Many rural men paid $10,000 to $25,000 for matchmaking to arrange such marriage. The issue is that many of the mail brides might not have been willingly married those rural males. Either they know but were forced by their families or they don't know and were tricked by human traffickers.Hows the enforcement on mail order brides in China these days. I know there won't be much official data but I would not be surprised if China has been loosely enforcing these rules these days.
How about single rural males that aren't in the border regions, is bringing mail order brides to them considered human trafficking? I'm thinking there can be programs that achieves similar results without the "human trafficking" stigma associated.
Often, many of these mail brides might have involved in the human trafficking scheme themselves to defraud rural Chinese males by only marrying these men for weeks or months and then fled.
For towns that are bordered SEA nations, it is less likely to happen as such marriage would more often arrange across the border. For those that in central China or east coast, many of them would travel to Vietnam or SEA nations and meet up with potential brides and got married. However, there are a lot of frauds. Sometime, rural men just see pictures online or from matchmakers and agree with such arrangement and often such arrangement has the potential of human trafficking.
It doesn't matter if such arrangement is fraud or women got tricked or it is legally arrange, these women can escape and leave through calling police or seek helps through relatives in their countries by claiming they have been abducted and needed rescued. The result is the same. And the Chinese government has to send these young women back to their native countries.
In addition, sometime, even those who got into China in proper channel would marry and then flee and work illegally as prostitutes in China and earn money.
The best way is to have done this through proper and legal channel. First, rural males visit potential mail brides in SEA nations and spend sometime with them. Second, got married and applied for Q visa and bring them back to China. Third, don't give them permanent residency until many years. But if they want to leave, there is nothing you can do about it. Sometime, legitimate matchmakers would rearrange another mail bride without extra fee. However, if it is done properly, at least you don't have to deal with human trafficking issues that happened quick often that would force the Chinese government to get involved and crackdown.