Pinduoduo platform's "koi fish Attachment" is a kind, in which users have the opportunity to get additional rewards by participating in specific activities or completing certain marketing activities, such as cash-filled red envelopes, purchase discounts, etc.

It is not an easy task to successfully withdraw cash through "koi fish's possession". It usually requires many attempts, sometimes even dozens or even hundreds of attempts. Although "koi fish possession" provides the possibility of withdrawing cash, there are not many users who can successfully withdraw cash in actual operation.