Hong Kong is said to be the best place to quickly get a cheap China Visa? Is that true?

yes, Hong Kong is the best place to quickly get a China visa, but it is not very cheap. Not nationals of all countries can get a China visa in Hong Kong if they don't reside or work in Hong Kong. It is possible for German passport holders to get a China visa in Hong Kong, it costs HK$200 for single entry visa, if you want to get a visa on the same day of application, it costs extra HK$300 /person.