What does the second generation of China people mean?

Generally speaking, Hua Er generation refers to the children born abroad by China people who emigrated overseas. They often grow up under the dual influence of the cultures of the countries of emigration and China, and this group itself has some distinctive features. Furthermore, some scholars put forward the concept of "1.5 generation immigrants", which refers to those children or teenagers who grew up in China and moved to other countries with their families. Compared with the second generation of Chinese, "1.5 generation" has some special features.