Many people in Jiayuan wrote to me, and I replied. But they never replied. Is that fake?

Many of them are system letters. When you see a letter sent to you, even the sender doesn't know that he sent you a letter. Because Jiayuan has many things like "love encounter", "one-click love" and "telepathy". For example, if you see a nice person in telepathy, you click TA, and then the system will automatically notify that person by email, but you didn't send him a letter at all, but he thought you sent him a letter. This is one of the most cheating behaviors in jiayuan, because letters sent in the past can only be read with stamps, thus jiayuan expanded the charging range and frequency in disguise. What a fighter in a trap. Especially for men, many people unconsciously spend a lot of stamps, so Jiayuan is happy to count the money.