The modern society is a society with advanced productive force. Under this circumstance, people all around the world live a life with high consumption level. However, the appeals the modern generation to pay more attention to positive cons…

There is a fisherman from the sea groan a large, put it down. However, there is a small black spot above the pearl. The fisherman thought, if they could get rid of black specks, pearl will become invaluable. So he put a knife to scrape the…