For recruiting units, under normal circumstances, education below high school is a file. Except for factory workers and hotel waiters, few positions care whether the candidate has a high school education or a junior high school education. So, I think LZ's question is ok. Just say that after graduating from high school, the diploma is at home or lost, and generally no one will take care of it. Even if you care, it doesn't matter, because there is no evidence to check the high school diploma online, which can be said to be dead men tell no tales.