Why Japan and South Korea have bad relations with China? Why do so many Japanese travel to China and South Korea and give them a lot of money?

At this time, it is actually very difficult to shout slogans and buckle big hats so that everyone can boycott Japanese goods and Korean goods. It is normal for ordinary people to buy something with good quality and not too expensive with their hard-earned money. Is it unpatriotic to buy things from Japan and South Korea? ! Every year, 78 million people encounter problems when traveling to Japan? You should know a so-called boycott of Japanese goods, any brand of mobile phones, cameras, air conditioners, cars, computers and so on. For TA, there are a large number of Japanese spare parts, and even the anti-counterfeiting of RMB uses Japanese technology. As long as TA watches TV, it is shot, edited and transferred by Japanese equipment; China produces and sells a Toyota Corolla, and the total tax revenue of the government is 1.7 million yuan, while that of Japan is 1.9 million yuan. Japanese-funded joint ventures have provided nearly 60 million jobs in China. What will the government do if all Japanese-funded enterprises close down and tens of millions of people lose their jobs? Be strong and self-reliant first. I wish the great Chinese nation a real strength at an early date.