Chai Sen, a top physics teacher in China, is the founder and CEO of the online education program named Chaisen Physics. In 2020, Mr. Chai was a guest at the "Entrepreneurship" talk show hosted by Ms. Zhu Xun from CCTV. He won the Integrity Brand Award of CCTV Chinese Brand List in 2020. Also, he successively published the bestsellers such as Easy to Learn, Easy to Learn II, A Complete Set of Questions and Methods in Junior High School Physics, A Complete Set of Questions and Methods in Senior High School Physics. His belief is focusing on physics, devoting himself to teaching research, helping students improve their scores, and believing in the power of word-of-mouth advertising.