It is difficult to give a definite answer as to which hot brine in Changsha is delicious, because everyone has different tastes and preferences for hot brine. However, the following are some famous hot pot restaurants in Changsha. You can choose according to your own tastes and preferences:

1. Li Ji Hotpot: Li Ji Hotpot is a very famous hot pot brand with a long history and a good reputation. Its hot brine is fragrant, delicious and relatively affordable.

2. Pozi Street Hot Pot: Pozi Street Hot Pot is a very famous hot pot restaurant on Pozi Street in Changsha, with a long history and a good reputation. Its hot brine is delicious, rich in taste and affordable.

3. Nanmenkou Hot Pot: Nanmenkou Hot Pot is a very famous hot pot restaurant in Nanmenkou, Tianxin District, Changsha. It has a long history and a good reputation. Its hot brine is fragrant, delicious and relatively affordable.

In addition to the above shops, there are many other hot brine shops in Changsha, such as the old Changsha hot brine and Jinsha River hot brine. You can choose according to your own tastes and preferences.