China has been playing a constructive role in promoting peace talks and has not provided military assistance to any conflicting parties, the Chinese Embassy in the US said on Wednesday, in response to the US adding five Chinese firms to a trade blacklist for allegedly supporting Russia's military.

China has always been firmly opposed to the unilateral sanctions and so-called "long-arm jurisdiction" imposed by the US, and China will take all necessary measures to safeguard the legitimate rights and interests of its companies, the embassy said.