Hi! My friend's going to Thailand from Guangzhou,China. He's goin to get VOA to Thailand and make chinese visa in Bangkok,as his current chinese visa will be cancelled. He has round trip tickets: GZ_BKK_GZ! Is there any problem in getting VOA,if you have return ticket to China,but don't have valid chinese visa? In China he was refused in visa extension,as he just arrived in China and wanted to get the new one just after 3 days,but the local Immigration Department said can not!

no, emmigration, at least at the Bangkok airport, doesn't even check the return ticket. The whole process takes 1 minute and usually there is no que

Thai Immigration will only be interested in a return ticket, if they even ask.

On departure the airline will want to see a Chinese Visa, but your friend should be OK by then.