A recommendation letter for my permanent residence application I enthusiastically endorse the permanent residency petition of Dr. Ching Yu, who I firmly believe has extraordinary ability in plant breeding and genetics research. I am the Supervising Science Research Specialist at Philippine Rice Research Institute. I earned my Ph.D. degree from the University of Minnesota in 2006 and have been working in the area of plant breeding for 12 years in the U.S. and Philippine. In fall 2013, I visited the lab where Dr. Yu works to enrich my understanding in plant genetics since this lab is one of the best in the world in this area. I came to U.S. with raw data and left with solutions and a finished manuscript. During my visit, Dr. Yu provided many helpful suggestions that speeded up and elevated my research. For example, I had ever been struggled with one analysis for days before I asked Dr. Yu for assistant. He solved the problem within 10 minutes by a method I never thought about, which illustrates his accumulation of experience and extraordinary research ability in this specific area. In the past, he published more than 10 articles in premier journals in this area including the one published on journal of experimental botany. These journals serve as important resource and reference material for researchers and industry professionals in the field to understand innovative and cutting edge technologies. Currently, Dr. Yu played critical rule in this lab by leading one sorghum ‘genomic selection’ project and one maize project. Total funding for these two projects adds up to more than one million. These researches provide valuable insights to help scientist and breeders to better understand the genetic basis of elite plant varieties, select promising materials and reduce the cost for plant breeding. With these, I strongly support his permanent residence application. If approved, he will be allowed to continue his research career in the U.S. which will be benefit this country. If I can be of any further assistance, please do not hesitate to contact me.