Less than 6 dollars, usually within 1.3 kilograms.
Find a smaller courier company to start with that will give you 6 bucks for shipping. But it can only be sent within the province and Jiangsu, Zhejiang and Shanghai, these developed areas.
Far away shipping costs are still very high, and you basically don't take orders from far away at the beginning.
Most of the buyers are also from Jiangsu, Zhejiang, Shanghai, Beijing, Guangzhou, Shenzhen and these developed places, enough for you to start.
Later orders more, you can find a bigger courier company to talk about.