Put the pork and peeled and deveined shrimp in a food processor. Blend until you form a smooth paste.
Season with salt, white pepper, chicken bouillon powder, garlic powder, light soy sauce, cooking wine, oyster sauce, and sesame oil. Mix well.
Cut the shiitake mushrooms into small bits.
Mix the chopped mushrooms and corn into the meat mixture. If using canned corn, be sure to drain any excess liquid.
Take your wonton wrappers and place a teaspoon of filling in the center. Wrap the filling by pulling up the edges of the wrapper, giving you a basket-like shape. For decoration, consider topping it with shrimp, peeled and deveined, without the heads.
Line the steamer basket with parchment paper, place the shumai, and steam for 8 to 10 minutes until cooked.