No data out of china ever is correct. Whatsoever. Don't believe anything that any Chinese user says.
Let's forget about height statistics.I can swear to you that Chinese media's statistics and sceneries are mostly fabricated especially like News Report,Shanghai Morning,Yangshijujiao and similar TV programmes.They won't tell you the truths and the crimes invovled in them are relevant to bureaucratisms,egoisms,authoritarianisms,chauvinisms,and socialisms.You won't see a indigent peasant in a remote village loading a heavy backet and sitting beside a tree complaining how the world is mistreating him and instead announcing he is living a very happy life thanks to the communists.
As a Chinese I must smash all fabricated prosperities and living standards to achieve true comments and the reason why my compatriots are not telling the truths is either not having balls or to condescend upon all developed countries(although our ideologies and philosophies are warning ourselves against comparing to any country in any aspect).
Now the domestic 18-20 y.o student physical examination's statistics have been published out and they are offically announced at most '173.27cm' instead of Lancet's fking '175.7cm' in addition to the prevalences of ultrasonic wavers.So 175.7cm is a huge crap which only fools would like to devour.