Plums are neither hot nor cool fruits, they are warm fruits.

Plum (Prunus salicina Lindl.), Rosaceae plum genus of woody plants, branchlets glabrous; leaf blade is rectangular obovate or elliptic obovate; pedicel is glabrous, sepals oblong-ovate, petals white, oblong-obovate; fruit yellow or red, sometimes green or purple, covered with wax pollen; flowering in April; fruiting period in July-Aug. The fruit is yellow or red, sometimes green or purple, covered with wax pollen; flowering April; fruit July-August.

Li is native to southeastern China and is now cultivated in most areas around and south of the Qinling Mountains in China. Li has a strong adaptability to climate, and is suitable for growth in places with loose soil and good drainage, often born in thickets on mountain slopes, in open forests in valleys, or at water's edge, ditch bottoms, and roadsides at altitudes of 400 to 2600 meters. Lee's breeding methods are more, there are cuttings seedling method, split seedling method, grafting seedling method, seedling method and so on.

Morphological features:

Deciduous tree, 9-12 meters high; crown widely rounded, gray-brown bark, undulating; old branches purple-brown or reddish-brown, glabrous; branchlets yellowish-red, glabrous; winter buds ovoid, reddish-purple, with several imbricate arrangement of scales, usually glabrous, sparse scales with very sparse hairs on the edge. Leaf blade oblong-obovate, long elliptic, sparsely oblong-ovate, 6-8(-12) cm long, 3-5 cm wide.

Apex acuminate, acute or shortly caudate, base cuneate, margin rounded and obtusely biserrate, often mixed with simple serrations, toothed with glandular apices when young, dark green above, glossy, lateral veins 6-10 pairs, not reaching the margins of the leaf blade, at an angle of 45° to the main veins, glabrous on both surfaces, sometimes sparsely pilose below along the main veins or bearded at the axil of the veins; stipules membranous, linear, apex acuminate, with glandular margins, caducous; petiole 1-2 cm long, usually glabrous, apically with 2 glands or absent, sometimes with glands at basal margin of leaf blade.

Refer to Baidu Encyclopedia-Li for the above