Crystalline　red　phosphorus　(CRP),　known　for　its　promising　photocatalytic　properties,　faces　challenges　in　photocatalytic　hydrogen　evolution　(PHE)　due　to　undesired　inherent　charge　deep　trapping　and　recombination　effects　induced　by　defects.　This　study　overcomes　these　limitations　through　an　innovative　strategy　in　integrating　ruthenium　single　atoms　(Ru1)　within　CRP　to　simultaneously　repair　the　intrinsic　undesired　vacancy　defects　and　serve　as　the　uniformly　distributed　anchoring　sites　for　a　controllable　growth　into　ruthenium　nanoparticles　(RuNP).　Hence,　a　highly　functionalized　CRP　with　Ru1　and　RuNP　(Ru1-NP/CRP)　with　concerted　effects　in　regulating　electronic　structures　and　promoting　interfacial　charge　transfer　has　been　achieved.　Advanced　characterizations　unveil　the　pioneering　dual　role　of　pre-anchored　Ru1　(analogous　to　the　＂Tai　Chi＂　principle)　in　transforming　CRP　photocatalysis.　The　regulations　of　vacancy　defects　on　the　surface　of　CRP　minimize　the　detrimental　deep　charge　trapping,　resulting　in　the　prolonged　lifetime　of　active　charges.　With　the　well-distributed　in　situ　growth　of　RuNP　on　Ru1　sites,　the　constructed　robust　＂bridge＂　that　connects　CRP　and　RuNP　facilitates　constructive　interfacial　charge　transfer.　Ultimately,　the　synergistic　effect　induced　by　the　pre-anchored　Ru1　endows　Ru1-NP/CRP　with　an　exceptional　PHE　rate　of　3175　mu　mol　h-1　g-1,　positioning　it　as　one　of　the　most　efficient　elemental-based　photocatalysts　available.　This　breakthrough　underscores　the　crucial　role　of　pre-anchoring　metal　single　atoms　at　defect　sites　of　catalysts　in　enhancing　sustainable　hydrogen　production.