On the morning of August 14, 2015, Mr. Kailong Li successfully passed his Master of Applied Science defense. The title of his thesis is “A market-baseed arid-region water resources planning model: Application to Guhai water distribution system, China”. His profound knowledge and excellent presentation helped him win the good evaluation from external examiner, Dr. Yiyu yao and other examining committee members (Drs. Gordon Huang, Chunjiang An and Yee-chung Jin).