Cut scallion, coriander buckwheat noodles (cold noodles) soak them in water (if it is a cold water bubble, it will take a long time, generally use 50 degree hot water to soak). After preparing the noodles noodle soup, put the cold noodles in boiling water until they are soft (usually 6 to 10 seconds). In the bowl, gently pour the big bone soup with boiled meat, then put the hot cold noodles into the bone soup. On the noodles, put the sliced beef slices the boiled sauce (each restaurant has different sauce, so the taste is different), of course, scallion coriander (stir fried chili noodles vinegar with appropriate amount of oil) serve them. It's hot sour. It's very delicious for the local people to go home. North Korea cold noodles special noodle juice: prepare scallion ginger slices, as well as white vinegar red vinegar, which can be bought in supermarkets. Then put the scallion ginger slices together with a little pepper large ingredients into the pot, add a little water, open fire to boil it, we can see that the juice in the pot has turned red, then filter out the raw materials, add a little red vinegar white vinegar, a small amount of salt, monosodium glutamate, sugar, so that the sour sweet noodle juice is ready. Next, just put it into the refrigerator to cool. Quercus liaotungensis Quercus mongolica are famous oak trees in the north of China. In the south, there are dozens of oak species, such as Cyclobalanopsis glauca, Quercus acutissima, Quercus acutissima, Quercus variabilis Quercus variabilis in the north south. Oak is a treasure all over the body. In addition to its edible fruit, its wood is solid has good corrosion resistance. It is a good material for making furniture, farm tools, sleepers, pillars poles. The charcoal produced by oak has strong firepower is durable. Oak bark acorn shell are rich in tannin, which are good raw materials for extracting tannin extract in industry. Rotten oak can also be used to cultivate nutritious delicious mushrooms fungus. Acorn is a kind of fruit of oak tree. There are many acorns in Eastern Hubei, which is similar to silkworm cocoon, so it is also called chestnut cocoon. Acorn outside hard shell, brown red, inner kernel such as flowers, rich in starch. When Du Fu was poor, he would eat time to time. Acorns can be eaten. However, some acorns (especially the black acorns of red oak) contain a lot of tannins. If you eat them directly without treatment, you will feel bitter astringent. The green acorn of white oak has lower tannin content sweeter taste, which can be eaten raw cooked.