Why do many countries try to attract large groups of international tourists?

Well, the main reason is economic benefits. Tourism brings in foreign currency and creates jobs, which really boosts local economies. Take Hangzhou for example - my hometown - where West Lake attracts millions of visitors every year. All those tourists need hotels, restaurants, and tour guides, so it supports many small businesses. That said, there's also a cultural exchange aspect - when I visited Jiuzhaigou, I noticed how international tourists were fascinated by Tibetan culture, which helps preserve local traditions too.