Which countries have (use) Chinese?

There are a large number of Chinese characters in the official written languages of North Korea and South Korea, such as common office signs, which are widely used in Japan. I don't know if there is. The latest news is that Japan has recently opened a subway for women only. The signs and signs of the subway are all in Chinese. On the contrary, Singapore, which is dominated by Chinese, is increasingly restricting the use of Chinese. When Singapore's new pro-American Prime Minister Lee Hsien Loong took office, he was very strict. As for the suggestion that Singapore should abolish Chinese, some Southeast Asian countries also use a lot of Chinese characters. In addition, ancient Chinese characters and porcelain have also been found in some ancient scripts and utensils in South America. According to textual research, when Zheng He went to the Western Seas, a fleet had been to South China and spread some American culture there.