I will go to Dhaka, Bangladesh from South Korea by China Southern Airlines.Transit is in Guangzhou, China for 3 hours 50 minutes. Within this transit time can we complete all formalities? I mean can we reach in our connecting flight properly within this transit time? I also want to know, in hand luggage how much Kg can bear one adult and one child? Is there any specific size of hand luggage for traveling in China southern airlines? Please let me know anybody about the service of China southern airlines from Korea to Dhaka, Bangladesh, because I will travel with a child