Building　a　donor-acceptor　(D–A)　type　polymeric　carbon　nitride　is　a　promising　way　for　synthesizing　high-performance　photocatalysts.　Compared　with　introducing　an　acceptor　unit,　incorporating　donor　blocks　can　effectively　extend　the　absorption　range　without　altering　H2　production　sites.　Herein,　we　report　a　facile　method　to　construct　a　D-A　structure　by　introducing　the　creatinine-derived　moiety　(CDM)　into　melem　networks　via　copolymerization　of　creatinine　and　urea.　CDM　units　arouse　a　new　absorption　band　at　500　nm　and　result　in　the　LUMO　and　HOMO　distribute　at　melem　and　CDM　unit,　which　promotes　the　charge　spatial　separation.　The　optimal　photocatalytic　activity　of　9454　μmolg−1　h−1　can　be　achieved.　That　does　not　only　improve　the　apparent　quantum　yield　(AQE)　at　420　nm　from　3.80　%　to　8.41　%　but　also　raises　the　AQE　at　500　nm　from　0.71　%　to　4.57　%.　This　strategy　provides　the　potential　to　extend　the　further　visible　light　response　with　a　decent　performance.　©　2021　Elsevier　B.V.