网上的人爱吹牛逼,有时候吹夸张了,但是年轻一代身高快速增长我觉得是事实🥺。之前柳叶刀推测中国19岁年轻人平均身高175的时候我也先震惊了一下,后面就算了算我们班男同学的平均身高,发现正好是175cm。但即便如此中国人身高的方差非常小,所以高过180的人并不多。
Not pertinent to this topic, but I think to let others understand what you are saying, it's better to say it in English.
Firstly, only one class has very large 'Standard Error' since the sample size is small, not to mention the sample you collected has other issues that you forgot to account for like major(if you are studying in a uni), the kind of your school, educational quality of your school, age and region.
There is a Chinese anthropometric journal named 中国学生体质调研, aka The Health Study of Chinese Student, which gives the data of Chinese student's average height accounting for all of the factors that need to be accounted for, subsuming major, school etc.. The average height measured by it is close to 173cm. You can say this is lower than the average height of your class but no one said you could not have a class whose average height is 175cm in a country with an average height of 173cm.
There are also other excellent data that can prove it and prove the validity of the data of The Health Study of Chinese student.
Speaking of which, 173cm is really a legit average height in China, and even if you are living in the Northern China it will be just slightly below average there. If someone felt inferior at this height, clearly he has other issues except height, like Cognitive Dissonance. Just too many people are either humble bragging or inflating their heights. Like 70% of people will be surprised if they measure their heights in a rigorous enough way.
Well you have to know that, European countries 'only' have 178-183cm or so average heights and there are still tons of men under 175cm or even 170cm. You can say the youngest generation of China is tall relative to the old generations but they are still way shorter than Europeans. It's infatuous to bluff their average height as tall as or even taller than them, as having been seen for millions of times on the Internet.