▁of ▁Lee ' s ▁other ▁production , ▁Det ect ive ▁Col um bo , ▁in ▁August ▁ 2 0 1 2 . ▁The ▁Chinese ▁working ▁title ▁of ▁No ▁Reserve ▁was ▁announced ▁to ▁be ▁" D ip ▁Hy ut ▁Chi ▁Hung " ▁( ). ▁The ▁title ▁was ▁later ▁changed ▁to ▁" D ip ▁Hy ut ▁Che ung ▁T in " ▁( ). ▁ ▁A ▁cost ume ▁fitting ▁press ▁conference ▁was ▁held ▁on ▁February ▁ 2 0 , ▁ 2 0 1 3 . ▁Princi pal ▁phot ography ▁began ▁on ▁March ▁ 1 1 ▁in ▁Hong ▁Kong . ▁Other ▁film ing ▁locations ▁included ▁F os han ▁and ▁Zh ong sh an . ▁A ▁bless ▁ceremony ▁was ▁held ▁on ▁April ▁ 8 . ▁Phot ography ▁wrapped ▁up ▁in ▁July ▁ 2 0 1 3 . ▁ ▁Cast ing ▁The ▁success ▁of ▁Ros y ▁Business ▁and ▁No ▁Reg rets ▁rela unch ed ▁the ▁care ers ▁of ▁main ▁leads , ▁Sh eren ▁Tang ▁and ▁Wayne ▁La i . ▁Both ▁leads ▁respectively ▁won ▁best ▁actress ▁and ▁actor ▁at ▁the ▁TV B ▁An ni versary ▁Awards ▁two ▁years ▁in ▁a ▁row ▁for ▁their ▁acc laimed ▁performances . ▁In ▁late ▁ 2 0 1 1 , ▁La i ▁stated ▁that ▁he ▁would ▁be ▁willing ▁to ▁push ▁aside ▁other ▁film ing ▁offers ▁in ▁order ▁to ▁accommod ate ▁his ▁schedule ▁to ▁film ▁No ▁Reserve . ▁La i ▁re conf ir med ▁this ▁statement ▁with ▁the ▁Singapore an ▁media ▁in ▁July ▁ 2 0 1 2 . ▁Tang ▁also ▁priv ately ▁agreed ▁to ▁help