Is the influx of immigrants a blessing or a curse for Germany?

This problem should be divided into two aspects:

One: disaster. The imperialist aggression brought shame to China, and it signed a series of unequal treaties, such as treaty of nanking, Sino-French Treaty, treaty of shimonoseki, Xin Chou Treaty, ceded land, paid reparations and lost sovereignty. Moreover, the entry of foreign capital has seriously hindered the economic development of China, leading to the long-term backwardness of China.

Two: profit. I don't say happiness, because imperialist aggression will not bring happiness at all. However, imperialist aggression has become an unconscious tool of history. The imperialist aggression first greatly impacted the feudal rule for thousands of years. Secondly, the influx of foreign capital and technology stimulates China people to learn foreign advanced technology. Ethnic, legal and scientific ideas were also introduced into China.