Foreign Minister Qin Gang praises Americans in tweets, signaling improved relations between US and China.
Ties between the two countries have improved since talks between President Biden and Chinese leader Xi Jinping.
US Secretary of State Antony Blinken is to visit China early this year.
Discussions on topics such as climate change have resumed after being halted in August.
China has expressed frustration with US support for Taiwan and called for steps toward dialogue.
The People's Liberation Army recently held military drills near Taiwan.
Qin showed a softer side of Chinese diplomacy during his year in Washington.
Wang Yi, now in a top foreign policy position, says China will establish guidelines on US relations.