Where is the formula of the original god buckle three silk?

Operating system: win 10

Operating software: Protogod

1. After entering the game, go to the People's Hall circled in red in the figure, as shown in the following figure:

2. Talk to Master Mao and choose that I want to pack and take away, as shown below:

3. You can use 5000 molars to buy a three-thread buckle formula, as shown below:

4. Go to the stove and choose cooking, as shown below:

5. You can use 2 hams, 2 poultry, 1 bamboo shoot and 1 mushroom to make shredded pork, as shown below: