No, according to relevant public information, all schools registered by the Education Bureau have official seal numbers, not all schools have them, and they are different from place to place. The official seal number is the company registration number, which can be found on the website of the industrial and commercial bureau where the company is located. The numbers on the official seal are also forged codes, most of which are 13 numbers. The first four digits are the area code, not the area code, which corresponds to the first four digits of the business license. The fifth, sixth and seventh digits are the company numbers with the qualification to engrave official seals.