  We report the first dark matter search results using the commissioning data
from PandaX-4T. Using a time projection chamber with 3.7-tonne of liquid xenon
target and an exposure of 0.63 tonne$\cdot$year, 1058 candidate events are
identified within an approximate nuclear recoil energy window between 5 and 100
keV. No significant excess over background is observed. Our data set a
stringent limit to the dark matter-nucleon spin-independent interactions, with
a lowest excluded cross section (90% C.L.) of $3.8\times10^{-47} $cm$^2$ at a
dark matter mass of 30 GeV/$c^2$.
