Various　policies　on　electric　vehicles　(EVs)　have　been　implemented　in　Beijing　to　promote　EV　diffusion,　but　previous　research　has　rarely　considered　the　indirect　network　effects　between　EVs　and　EV　charging　infrastructures　(EVCIs),　and　has　not　explored　the　impact　of　EVCI-related　incentives　on　EV　diffusion.　This　study　aims　to　enrich　the　literature　by　incorporating　EVCI　development　and　indirect　network　effects　in　EV　diffusion.　A　system　dynamic　model　is　proposed　to　systematically　analyse　the　interactions　among　consumer,　EV　manufacturer　and　EVCI　operator　and　simulate　EV　diffusion　and　ECVI　investment　in　Beijing.　Multiple　scenarios　are　adopted　to　investigate　the　joint　effects　of　the　policy　mix　on　EV　diffusion.　The　results　indicate　that　the　oil-toelectricity　subsidy　promoted　EVs　and　EVCIs　to　a　greater　extent　than　the　license　plate　control　policy.　The　EVCI　maintenance　policy　outperformed　EVCI　construction　and　production　subsidies　on　EV　diffusion.　Synergistic　effects　exist　when　the　oil-to-electricity　subsidy　is　mixed　with　EVCIrelated　incentives.　This　study　provides　implications　for　policymakers　to　promote　EV　diffusion　with　innovative　and　efficient　policy　instruments.