1 Put the box down, draw a square on the side of the paper suitcase, and then cut a hole with a knife to observe the state inside. Draw a small circle on the top of the paper suitcase, and then draw a small hole with a knife to make it easy to put the mobile phone. Only when you turn on the flashlight can you see the state inside (this hole can also be omitted, and you can see the square hole on the side, so take a photo with the flashlight). Just insert the thermometer needle directly into the other one, preferably next to it, otherwise the dough will be punctured when it is fermented.