Abstract. The mechanism of high-temperature superconductivity still remain mystery and many scientists try to understand it, but there are too many theories and no one is accepted by all people. The uncertainty of experiments is responsible for the difficulty to explain the mechanism of high temperature superconductivity. The compounds HgBa2Can–1CunO2n+2+δ (Hg12(n-1) n) can be viewed as model systems not only because of their record high-Tc values, but also because of their simplest and high-symmetry crystal structures (P4/mmm). Here we report a novel recipe for the growth of Hg1201 crystals. We improve the previous solid state synthesis, and adopt two-step process for the crystal growth of Hg1201. The magnetic property of Hg1201 crystals were measured with Quantum Design MPMS (SQUID).XPS measurements was used to understand the electronic structure of the cuprates with the concentration of doping.