You didn&;t specify where you are in Guangzhou? If you are at Guangzhou Railway Station, you can take the bullet train to Luohu, Shenzhen, and then transfer to Baoan Airport by subway. If you are at Guangzhou Bus Station, you can take a long-distance bus and get off at Fuyong Bus Station in Shenzhen. Go straight to Fuyong Bus Station (outside G107 Station) and transfer to M332 Road (take 4 stops) and get off at the East Airport Bus Terminal. The third is to make an appointment to take a taxi.