Toon often do not blanch will be poisoned. Toon contains nitrite and other ingredients, need to blanch when eating. If the toon forgets to blanch, once in a while to consume and intake is relatively small, the body generally will not appear toxic phenomenon. However, if consumed frequently or in large quantities, poisoning may occur. Toon, neem family toon genus perennial woody plants. The bark is rough, dark brown; there are feathery compound leaves; the petals are white, oblong, and the disk is glabrous, nearly moniliform; the fruit is narrowly ellipsoid, dark brown, with small pale lenticels. Flowering occurs from June to August and fruiting from October to December. Toona sinensis is native to China, with North, East, Central, South and Southwest provinces and districts as the main producing areas, and North Korea also has a distribution. Toona sinensis is light-loving, warm-loving, and moisture-tolerant, and is suitable for growing in fertile soil near rivers and around houses. Breeding is usually done by seed propagation.