Carbon　nitride　(CN)　has　attracted　intensive　attention　as　a　visible　light　photocatalyst,　but　the　rapid　recombination　of　photogenerated　charge　carriers　limits　its　photocatalytic　activity.　Herein,　we　develop　a　new　strategy　to　construct　both　homojunction　and　ohmic　junction　into　CN　via　selectively　introducing　metallized　CN　(MCN),　which　leads　to　rapid　separation　and　transfer　of　photogenerated　charge　carriers.　The　polymerization　of　urea　in　the　presence　of　KOH　creates　CN　homojunction　with　amino　and　cyano　groups.　The　subsequent　molten　salt　treatment　induces　a　new　type　of　cyano-terminated　CN　that　can　be　converted　to　MCN　through　photodoping,　forming　homojunction　and　ohmic　contact　coexisting　CN　(HOCN).　The　formed　HOCN　photocatalyst　exhibits　a　high　photocatalytic　H2　evolution　rate　of　18.5　mmol·g−1·h−1　under　visible　light　irradiation,　45-fold　higher　than　that　of　bulk　CN.　This　strategy　provides　a　new　idea　for　designing　ohmic　contact　between　semiconductor　and　metal,　and　realizing　efficient　photocatalysis　by　improving　charge　separation　and　transfer.[Figure　not　available:　see　fulltext.].　©　2023,　Tsinghua　University　Press.