Oh, plenty of possible reasons. For example in exchange for some captured spies or hardware. Or some other concessions. He also may have access to material nob

Oh, plenty of possible reasons. For example in exchange for some captured spies or hardware. Or some other concessions. He also may have access to material nobody published yet. Again, it's not about what happened, but what he would have had to fear if he didn't have contact with the Chinese or Russian government before fleeing there.