Raw beef, it is recommended that you eat as early as possible, fresh, then it is packed in a plastic bag, placed in the refrigerator at low temperatures, preservation time is generally 1-2 months, a long time, the taste of the meat to feel the impact, but also will change the flavor.

Cooked beef, preservation time is even shorter, the market products are preservatives plus vacuum preservation, it is difficult to have such conditions at home, generally in the refrigerator for 3 days, you can also put the stewed beef into the low-temperature refrigerator preservation, freezing it, and eat it when boiling, can also be.

1. Put wine in the meat. Put salt . Scratch it . Flatten. Put peanut oil on the surface (oil soaked meat) ---- twenty degrees can be put into the night (about twelve hours)

2. Meat in the soy sauce. Grab the cover (can be put about 6-7 hours at room temperature)

3. made of five spices of beef --- I do not know how to do, to see people do it can be put more than a month ---- summer oh

4. to do the soy sauce or marinated beef can be put in three or four days

5. sealing of the generation of good put in the well. Can be put into the next day (must be sealed or the well water will be contaminated by the meat)

Why the beef will be discolored I do not know --- oxidation reaction or something like apples --- or dehydrated --- most of the oxidation reaction of the food I have to use salt to solve the problem. Or vinegar. I don't know if it's possible with beef. I haven't noticed. Dehydrate food in a sealed bowl or bag, of course.