1/1/2017 · Liu YY et al. Chinese Herbal Medicines, 2017, 9(1): 22-30 22 Available online at SciVarse ScienceDirect Chinese Herbal Medicines (CHM) ISSN 1674-6384 Journal homepage: www.tiprpress.com E-mail: [email protected] Review A Review of Quality Assessment and Grading for Agarwood Yang-yang Liu1, 2, Jian-he Wei1, 2*, Zhi-hui Gao1, Zheng Zhang1, 2, Jun-chen Lyu2 1.