大小单双变化规律简介：When asked about the origin of the letter, the sender did not know. It is only said that he was an idle man in Hangzhou. He happened to meet a scholar and paid him some money to help him deliver the letter.
When asked about the origin of the letter, the sender did not know. It is only said that he was an idle man in Hangzhou. He happened to meet a scholar and paid him some money to help him deliver the letter.
