Does the subject want to ask "what is the starting point and purpose of establishing second-hand book groups?" Realize the enjoyment of resources and provide economic benefits.

1, realize the enjoyment of resources: the establishment of second-hand book groups can promote the enjoyment and circulation of book resources.

2. Providing economic benefits: It costs a lot to buy brand-new books, while the price of second-hand books is relatively low, which can provide economic benefits for readers.