https://www.vox.com/technology/2018/6/6/17433802/facebook-data-privacy-huawei-china

Facebook has data-sharing partnerships with four Chinese device makers, including Huawei, which has close ties to the Chinese government and has been flagged by US intelligence over national security concerns.

It wasn’t just Apple, Amazon, and BlackBerry that Facebook gave access to its user data. The social media company also has data-sharing partnerships with at least four Chinese electronics companies, including Huawei, which has close ties to the Chinese government and has been flagged by intelligence officials as a national security risk.