Sending small cards on the street is not a letter of help. The letter of help refers to that in some cities in China, salesmen of some private loan companies will post a small advertisement to pedestrians on the streets and in front of shopping malls, asking if they need loans and looking for potential borrowers.

The purpose of distributing small cards on the street is not to help loan companies attract customers, but mainly to publicize the information, products or services of some businesses, organizations or governments.