Those who would go to UK are the Chinese equivalent of Soviet nazi collaborators.
A certain sum of money needs to paid to get rid of them anyway, and they are scum that do not contribute to their home country. If China keeps them, they must eventually be ready to create gulag equivalents for them, in where the cockroach's costly rehabilitation and meals will be paid for by rest of society.
As such, even a deal where they are deported in exchange for a small one time cost for the government is not a bad deal. And a deal where they are deported with 0 cost for China, like the current one, is basically a steal.
A certain sum of money needs to paid to get rid of them anyway, and they are scum that do not contribute to their home country. If China keeps them, they must eventually be ready to create gulag equivalents for them, in where the cockroach's costly rehabilitation and meals will be paid for by rest of society.
As such, even a deal where they are deported in exchange for a small one time cost for the government is not a bad deal. And a deal where they are deported with 0 cost for China, like the current one, is basically a steal.