Why the chinese people getting taller what is the secret please someone can name the supplements?

Chinese as well as other people are getting taller because their nutrition is getting better. When people live near starvation, children do not get tall. ( See any 17th century farm building here or anywhere else and observe the height of their doors.)
I seriously doubt that there are any herbs or powders that will contribute to a person's height as much as a sufficient amount of calories every day.