Many companies, restaurants or even sports matches have to deal with competition on a daily basis. But they used many bad actions that make competition unfair. Here are some examples. In business, product disparagement is a popular thing. As you all know, opponents will give ugly news, making false claims about a competitor’s product to gain a competitive advantage and make your competitors fail to sell. In sport, many athletes have always looked for ways to win so they used banned substances in training and competition to improve performance. Obviously, it may lead to an athlete being banned, damage their life and their health will be greatly affected. Worse, causing injury to another person in the competition. For instance, In the match between Vietnam and Indonesia, the fierce and violent attack of Indonesia caused Nguyen Tuan Anh had to leave the field early due to an injury. In short, let's compete fairly to make society better