Getting to guangfeng country, Jiangxi Province

From your country, you need to fly to HK first and then fly to Nanchang, the capital city of JX Province. There are direct flight from HK to Nanchang on Tuesday and Friday.
From Nanchang Changan Bus Station near the local railway station, you can find the direct buses to reach Guangfeng County.

thanks so much for your reply!! Is it possible to take the railway from HK straight to Nanchang? Will that be a cheaper alternative?

It is possible to take the trains directly and it is truly much cheaper.