1) The customer service number of China Telecom is 10000. If you have any questions about telecommunications, you can ask them.
2) If you want to check the number, you can call 1 14 to check the information you want to know.
Friendly reminder: 1 14 can't help you check your personal phone number. But they won't tell you directly that you can't check it. They will ask who you are looking for and how to write your name. Then they will pretend to knock on the keyboard a few times to let you hear the keyboard sound, and then tell you kindly, "I'm very sorry, I didn't register the information you want."