https://arstechnica.com/science/2021/12/china-upset-about-needing-to-dodge-spacex-starlink-satellites/

Earlier in December, the Chinese government filed a document with the Committee on the Peaceful Uses of Outer Space at the United Nations. The body helps manage the terms of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, more commonly known as the Outer Space Treaty. In the document, China alleges that it had to move its space station twice this year due to potential collisions with Starlink satellites operated by SpaceX.

The document pointedly notes that signatories of the treaty, which include the US, are responsible for the actions of any nongovernmental activities based within their borders.