A high-quality compound library plays an essential role in virtual screening campaigns. A database with different types of small molecular compounds (usually including 100,000 to 1000,000 compounds) was applied for performing virtual screening and many novel active lead compounds with a biological activity can be obtained. Therefore, diverse active conformation of the target protein needs to be involved to support the subsequent model construction and docking process. Virtual Libraries https://drugscreening.bocsci.com/services/virtual-libraries.html