On October 31st, according to the surging news, in April 2021, Hangmou purchased the "mining machine" platform and 64 hard disks from Chen through WeChat, totaling 429,000 yuan. After Hangmou paid all the payment, he asked Chen about the equipment configuration, but Chen refused to fulfill the delivery obligation. After Hangmou asked the other party to refund part of the payment 180,000 yuan and continued to send 64 hard disks, Chen returned 180,000 yuan and still did not deliver the goods. Hangmou pleaded with the court, asking the court to order the defendant Chen to return the payment 249,000 yuan and pay the interest loss.