1. Collections have certain historical value: Zhengdong Auction Company mainly collects collections with historical, cultural and artistic values, such as ancient books, calligraphy and painting, jade, porcelain and jewelry.
2. High quality of the collection: Zhengdong Auction Company pays attention to the quality of the collection, so the collection must be kept intact or professionally repaired.
3. The source of the collection is legal: In order to avoid the acquisition and sale of illegal collections, Zhengdong Auction Company must ensure that the source of the collection is legal and need to provide relevant documents or proof of legal channels.