The Chinese government has ordered state offices and public institutions to remove foreign technology within three years. This is one of the latest developments in the trade war between China and the United States.

The order came from the Chinese Communist Party’s Central Office, which said the goal is to use “secure and controllable” technology as part of the country’s 2017 cybersecurity law.

Within three years, government agencies in Beijing will replace around 20 million computers with domestic products, as part of the country’s effort to boost its domestic industry by decreasing its reliance on foreign technologies. The directive aims to substitute 30% of the technology next year, 50% in 2021 and 20% in 2022.

The directive is a response to the Trump administration’s ban for US companies from doing business with the Chinese tech giant Huawei earlier this year. Other Chinese companies were also blacklisted.

As many tech products are developed for US operating systems like Windows for Microsoft, Beijing is expected to have a difficult time replacing all the devices and software with its technologies that don’t yet match foreign ones. The government offices usually use computers from the Chinese company Lenovo, but their components are made by US companies.