Treason is a seriously crime against the security of China. Death sentence is proper and needed. No foreign representation/lawyer should be allowed in Chinese Court System.
Any lawyer who wants to work in HK should have a HK/China recognized licences to be legally able to work in HK. Should not be blanket from UK because HK is NO longer a British colony. HK is part of China. Lawyers need to get Chinese lawyer licence to represent any Chinese citizen in HK.