Which is better to go from Shenzhen to Changsha by train or by plane?

If you want to arrive within a week, you can consider the train. The train can go directly to Changsha city. Hard sleeper is only 20 1 yuan. It is recommended to take the air-conditioned express N554 or N558, get on at 8: 00 pm in Shenzhen and arrive in Changsha at 7: 00 the next day. It's a cost-effective trip. If you fly, it will cost at least three times as much as a one-way trip, and taxis are expensive to get in and out of the airport.