Tea stems do not absorb formaldehyde, but only cover up the taste of formaldehyde. Some components in tea may react with formaldehyde, but they are only trace and have little effect. The most effective way to remove formaldehyde is ventilation, which is the most economical, simple and effective method. At the same time, some plants can be used to absorb formaldehyde, such as cactus and chlorophytum. Generally, plants and herbs with large leaves have the function of absorbing formaldehyde, such as chlorophytum, Huwei orchid and so on. If you want to stay in a newly renovated house, it is best to leave it at least three months apart, so that formaldehyde can be fully distributed within a period of time to avoid premature occupancy and harm to your health. When choosing decoration materials, we should choose healthy and safe decoration materials produced by big manufacturers, not cheap or small manufacturers, so there is no security guarantee. After the renovation, all the windows should be opened and ventilated for a period of time before moving in, so as to avoid the harm of moving in too early.