Many thanks to the person who shared that you can ask your local Chinese embassy for a copy of „The Governance Of China“.
I reached out to the Chinese embassy in Vienna and got not only a super friendly response, but also an invite to the embassy + 6 copies of the German translation (2x II, III, IV)!
The Chinese government is not big on drugs in general, yes. Part of that is that, like most elsewhere, the higher ranks of the CPC tend to be older and more socially conservative, but also China has some very understandable generational trauma about drugs from the Opium Wars and ensuing century of humiliation.