You might see blossoming now yellow flowers that resemble a plum. Your faithful correspondent looked into it and found it’s called the “roubai” (蝋梅 - literally, “wax plum” due to its waxy petals), and is in fact not a plum variety. It was domesticated in China as an ornamental plant during the Sung Dynasty and spread as far west as Iran and also to Japan. Wikipedia has the details at the link. - William