In China they usually execute their prisoners just the same as they do here in the USA.
China's prisoners are usually executed by lethal injection or firing squad by shooting them with a gun.
However sometimes China executes it's prisoners through hanging just like they did many years ago here in the USA.
In China you can be executed for drug trafficking and murder where's drug trafficking in the USA would maybe only get you 25 years to life in prison but unlikely to be executed here in the USA for drug trafficking.