The other thing that's important to realise is that the Chinese government is incredibly complex internally. There isn't some Bond-like villain stroking his white cat all day and issuing decrees. It's a massive beaurocracy. Politics are crazy. The totalitarian state does not act as a single will -- it's a massive system of infighting and people trying to get the upper hand. Within that system, each of the players will be using their legal system against one another. It really isn't the case that there is any one entity that's just making up the rules as they go along and that can do whatever they want with impunity (as your posting implies to me).
So, I'm inclined to lean towards believing a more complex reality than "they forced him to say that".