1. The first vegetable is mustard greens.

2. The first dish is made from dried and pickled mustard greens. It is one of the indispensable main dishes for northerners every day. First vegetables can not only promote the digestive function of the stomach and intestines and increase appetite, but can also be used to appetize and help digestion.

3. Mustard (scientific name: Brassica juncea (L.) Czern. et Coss.) is an annual herbaceous plant of the Brassicaceae family, Brassica, up to 150 cm tall, and its young stems and leaves have stinging hairs. , with a spicy taste; the stem is erect, and the leaf stalks have small lobes; the leaves on the lower part of the stem are smaller, with notched or serrated edges, and the leaves on the upper part of the stem are narrow and lanceolate, with inconspicuous sparse teeth or entire edges. The racemes are terminal and extended after flowering; the flowers are yellow, the sepals are light yellow, oblong-oval, and spread upright; the petals are obovate, the siliques are linear, and the seeds are spherical and purple-brown. It blooms from March to May and bears fruit from May to June.