  This note illustrates the Ricci flow method based on the Cao.H.D's paper[1]
and Yau.S.T's paper[4], and tries to explain the method in detail, especially
in some calculations. Jian Song and Weinkove's note[9] used some other
estimates to obtain the result, this paper will explain some of their estimates
as well. This note was a seminar lecture note in 2022 summer when the author
was giving lectures on the geometry analysis seminar reasearching the Ricci
flow method. The part of the imporatnt zero order estimate is going to be added
in a few days. The level of the author is limited, if there are any errors,
please do not hesitate to advise. Any comments will be grateful.
