Relations between the two countries continue to warm up.
Tips
usage
升温 is a news headline favorite. It's used figuratively for anything that's intensifying: 中美关系升温 (Sino-US relations warming), 楼市升温 (housing market heating up), 话题升温 (a topic gaining traction). The opposite is 降温 (jiàngwēn, 'to cool down').
