After arriving in Nanjing, take a taxi to the Chinese business market, where there are many distributors of drinks, liquor and beer. Among them, the largest liquor distributor in Nanjing (for Su Guo system) is Brother Liquor, with many names and telephone numbers of agents. Add my QQ and I'll give it to you.
There are also several dealers in Nanjing who supply Wal-Mart, RT Mart and Carrefour.
I wish you success!