Why do you say that? Today, CNN of the United States reported such a news that Costa Rica, a central American country, has just announced its opening to American tourists. < / P > < p > although this kind of opening-up is conditional, it is only open to six states in the United States, which is not very serious in epidemic prevention. However, under the situation that most countries in the world are “strictly guarding against Americans”, Costa Rica, a country that has always been despised by the United States, has been on CNN news because it is now open to American tourists. < / P > < p > but even so, the number of countries currently open to U.S. tourists is still very limited. CNN said in its report that Costa Rica is open to U.S. tourists, only “a few” countries are open to U.S. tourists. According to a report on August 13 of this year, 32 destinations are open to American tourists. On the other hand, on the social networking site “Twitter” in the United States, some American netizens who learned that Costa Rica is open to American tourists are worried about the country and think it is dangerous to open it to American tourists. However, Costa Rica has no choice but to open up to American tourists. Because an important pillar of the country’s economy is tourism, and American tourists are the country’s main financiers. According to the official website of the Chinese Embassy in the United States, tourism is the “main economic source and hard currency” of the country, while tourists from the United States and Canada are the most important groups of 1.7 million tourists in the country every year.