Can anyone advise how to go to Longhua from Luohu or Shenzhen airport?

From Luohu, you can take the Luobao Line to reach Exhibition Center Station where you can change to Longhua Line to reach Longhua Station.
From the airport, you can take the same line to reach Exhibition Center Station and then change to Longhua Line.
It is not suggested to take a taxi to reach directly, because the taxi fee in SZ is very high.