Hong Kong authorities have appointed a five-member supervisory committee to investigate the conviction of a district councillor for having sex with a 13-year-old girl 15 years ago.Yuen Long district councillor Sei Chun-hing, 39, is the first elected officeholder to face possible imprisonment for a criminal offence since Beijing’s 2021 electoral overhaul, which restricted public office to candidates vetted as “patriots”.Secretary for Home and Youth Affairs Alice Mak Mei-kuen said in a statement...