CKF30GU is the same as CKF25, so there is no need to choose 30GU. This is how the oven is fermented and thawed. Don't rely too much on these messy functions. The most important thing is baking. If the quality of tomatoes in Hao Tong is good, we should pay attention to whether the baking tray is rectangular. Some oven baking pans are bent on one side, so they can't be used.