Hi, sir, if you want a secure visit to Shenzhen, you'd better apply for a Shenzhen visa in advance through Chinese visa application service center in your country. Shenzhen visa arrival has stopped due to Asian games and saying goes that it will be available on and after Jan.3 at Luo Hu port.etc, but no one here acn assure you with that. BTW, no visa on arrival can be get from Shenzhen airport.