▁Lin ▁as ▁Chen ▁Ch ao yi , ▁a ▁detect ive . ▁ ▁Han ▁Ji - se ok ▁as ▁South ▁Korean ▁gang ▁young ▁leader . ▁ ▁A isa ▁S enda ▁as ▁Tang ▁Sh an ▁ ▁Fu ▁Le i ▁as ▁Director ▁Wu ▁ ▁Production ▁Production ▁began ▁in ▁Taiwan ▁on ▁ 1 4 ▁April ▁ 2 0 1 5 . ▁▁ ▁On ▁ 2 1 ▁June ▁ 2 0 1 5 , ▁the ▁film ▁crew ▁attended ▁the ▁ 1 8 th ▁Shang hai ▁International ▁Film ▁Festival . ▁ ▁On ▁ 1 6 ▁November ▁ 2 0 1 5 , ▁the ▁theme ▁song , ▁Inside ▁or ▁Out side , ▁was ▁released . ▁The ▁ending ▁theme , ▁The ▁Tr uth , ▁was ▁released ▁on ▁ 3 ▁December . ▁ ▁Music ▁ ▁Th eme ▁song : ▁Inside ▁or ▁Out side ▁( ), ▁lyr ics ▁by ▁Zh ong ▁M ux uan , ▁composed ▁by ▁Tan ▁Y iz he , ▁s ung ▁by ▁A ska ▁Yang . ▁ ▁End ing ▁theme : ▁The ▁Tr uth ▁( ), ▁lyr ics ▁by ▁D ai ▁Ba oj ing , ▁Ti ▁Y i ' en ▁and ▁Li ▁T ing ya o , ▁composed ▁by ▁D ai ▁Ba oj ing ▁and ▁Ti ▁Y i ' en , ▁s ung ▁by ▁D ai ▁Ba oj ing ▁and ▁A isa ▁S enda , ▁ ▁Release ▁The ▁film ▁premier ed ▁in ▁Be ij ing ▁on ▁ 1 8 ▁January ▁ 2 0 1 6 ▁with ▁wide - release ▁in ▁China ▁on ▁ 2 2 ▁January . ▁ ▁References ▁