Huawei has had a lot of problems in some countries. They have mainly had problems with the United States government. The US government said that the Chinese government could use Huawei's 5G technology to spy on people. Because of this, the US government does not want other countries to use technology by Huawei or ZTE. In May 2019, the US government put Huawei on a blacklist. This meant that Huawei could not do business with American companies.