Instructions：

1. Soak the dried deer sinew for 2 days and blanch it in water until soft;
2. After soaking the Shiitake mushrooms, cut off the mushroom pedicles;
3. Defrost the frozen beef short ribs, cut them into pieces, and add marinade to marinate for later use;
4. Heat the wok, add oil and sauté the mushrooms, add water and dried deer sinew, bring it to the boil.
5. Then add seasonings and reduce to a simmer over medium heat for 30 minutes, then stew with beef short ribs until deer sinew soften and serve.