Supor 5 liter computer board pressure cooker CYSB 50 YC 1- 100, can it be covered after the symbol B is displayed on the display screen?

If you are not particularly anxious, you can open the lid after the check valve falls (after the lid is closed, it should be in the same direction as the handle of the pot, and there is a small round hole on it. Looking down, you can see that the one-way valve is convex and is a small hollow cylinder. If you are in a hurry, you can adjust the pressure limiting valve, and there are generally instructions. If not, you should use your hands.