Does the subject want to ask, "Why can't the library card in Huangdao District be returned?"

1. In order to maintain the fair and reasonable utilization of resources, Huangdao District Library restricts each reader to have only one library card.

2. Huangdao District Library will apply for a new library card at will, which will cause individuals to occupy too many resources and other readers will not be able to enjoy their due resources.