06.  Appointed Vice English Panel at Hong Kong Education Department's Adult Education Unit at age of 21
07.  Joined the English Examination Panel at Hong Kong Education Bureau's Project Yi Jin Programme at the age of 22
08.  Became one of the youngest School Principals in Hong Kong at the age of 24
09.  Achieved popularity as an English tutor in Hong Kong, reaching the first peak of teaching 13,500 students monthly at the age of 29
10.  Recognized as most popular English teacher in Hong Kong, with a student base exceeding 100,000 over 20 years (1 in 70                       Hong Kong citizens ever been taught by K.Oten), earning the title of 'Tutor God' by CNN and ranking as Top 1 in Asia (2006-2018)
11.  Spearheaded the growth of three out of the Big 4 private education groups in Hong Kong from 2002 to 2018, including the                     listing of Modern Education (1082) on the HKEX Main Board valued at $USD 113 million
12.  Established the Oten Charitable Education Fund (2006-2014)
13.  Served as Editor & Creative Director of the Education Column at Sing Pao Newspaper (2007-2008)
14.  Founded and served as Principal of All Star Education Group in Hong Kong and China (2011-2019)
15.  Served as Regional Director at the University of Bradford from 2012 to 2014
16.  Established All Star Care, providing assistance to students in need since 2012
17.  Founded and directed the Hong Kong (Special) Education and Development Association since 2014

18.  Founded Hong Kong XP Lab, specializing in Extra Sensory Perception Experiments since 2017
19.  Held the position of Chief Academic Director (Greater China) at Stanford Education in partnership with Buckinghamshire                       New University since 2018 
20.  Served as the Academic Director & Board of Management of Focus Learning Education Group in Vietnam from 2022-2024