The RCOS 20" reflector of the National Astronomical Observatory of Malaysia has arrived in Hong Kong for maintenance and upgrade. In the past few days, I have received many private messages from local friends, as this telescope has made significant contributions to astronomical research and education in the country for many years, and it holds a special place in the hearts of many astronomers. Rest assured, I will do my best to complete the work and live up to everyone's expectations. Personally, my remote observatory in Tibet also uses an Officina Stellare RiFast 500 with the same aperture, but with a larger f/3.8 aperture.