The company arranged for me to go to Indonesia on business, but I got a tourist visa. What should I do if I am told by the immigration people that I am working illegally?

Of course it's illegal. The reason why the company gives you a tourist visa is generally because it is easier to apply for a tourist visa than a business visa, and the application fee for a tourist visa is low, the required materials are few, and the time for obtaining a visa is fast. But at present, not all countries open tourist visas to China. Most Southeast Asian countries have opened individual tourist visas, while European and American countries mainly use group tourist visas, but if individuals want to leave the country, they can only apply for business visas. Some countries do not open tourist visas, but only business visas. However, the key to applying for a visa ultimately depends on what country or region it is. Business visas and tourist visas are different in nature, mainly because the information required by the embassy is different. The embassy requires a lot of information, such as invitation letter, company information of both parties, unit certificate, etc. And business visas can stay longer than tourist visas. Neither a business visa nor a tourist visa can work in that country, but a business visa can conduct business activities, and it is relatively flexible outside, free to spend time, go wherever you want, and there is no limit on when you come back; However, there are many restrictions on tourist visas outside and they cannot move freely. But it depends on which country you are going to.