Clean the surface of the whole chicken, and hang the chicken with a special hook for hanging ovens.
Use a large soup pot, pour 2qt of water, and turn on high heat, after the water boils, pour boiling water over the whole chicken. It is good to see that the skin shrinks and pores appear, the purpose is not to produce a lot of oil when it dries. Then pour the whole chicken with cold water to make it cool down quickly. Finally, use a barbecue brush to brush the prepared sugar skin water on the chicken evenly. In order to make the skin crispy, you can apply it several times, or reapply it after half an hour.