Zinc(Zn)　metal　anodes　have　been　extensively　investigated　in　aqueousZn-ion　batteries　(AZIBs).　Nevertheless,　severe　dendrite　issues　causedby　uneven　ion　diffusion　and　Zn　deposition　greatly　influence　the　stabilityand　safety　of　AZIBs.　Herein,　a　novel　three-electrode　tubular　cellassembled　from　simple　materials　is　constructed　for　both　electrochemicalmeasurement　and　visual　characterization.　Measured　by　the　tubular　cell,a　water-in-salt　electrolyte　(WiSE)　exhibits　excellent　ionic　conductivity(33.29　mS　cm(-1))　and　reduced　corrosivity,　which　isprepared　by　incorporating　cellulose　and　polyethylene　glycol　(PEG)into　concentrated　zinc　chloride　(ZnCl2)　solution.　The　resultsreveal　that　the　functional　groups　of　cellulose　and　PEG　in　WiSE　canregulate　the　solvation　structure　of　Zn2+,　thereby　alleviatingconsecutive　side　reactions　and　inhibiting　the　formation　of　byproducts.The　inherent　ion　channels　formed　by　the　polymer　chains　and　the　physicalbarriers　constructed　by　PEG　on　the　Zn　surface　further　facilitatedthe　uniform　deposition　of　Zn2+　along　the　(002)　crystalplane,　enabling　the　Zn　symmetric　battery　to　achieve　an　ultralong　cyclelife　of　1000　h　at　a　current　density　of　2　mA　cm(-2).　Zinc　(Zn)　metal　anodes　have　been　extensivelyinvestigatedin　aqueous　Zn-ion　batteries　(AZIBs).　A　novel　three-electrode　tubularcell　assembled　from　simple　materials　is　constructed　for　both　electrochemicalmeasurement　and　visual　characterization.