The full name of the school. There are four official seals on the graduation certificate of high school in Liaoning Province. One is colorless, which is the steel seal of the school. The full name of the school is printed on it, half on photos and half on paper. There is also the red official seal of the school, and the other is the signature seal of the school principal when you graduate. Steel seal is a seal made of steel plate engraved with two seals: upper and lower yin and yang. It is usually overlaid on special documents or photos, with no color, only raised words, numbers and icons.