Do I need to have transit visa ?

Hello

My name is Ahmad Jawid Stanikzai from Afghanistan. Currently I am in Indonesia, and I want to go home (Afghanistan) in the upcoming holidays. In my ticket I see that in airline flight they have a 4-hour stay in CAN Guangzhou Baiyun International Airport T2, China. My question is, do I need to have a transit visa for this stay or not? Kindly give me this information.
Flight plan is like this, Jakarta》Guanzhou Airport and 4 hour stay 》dobai Airport 》final is Kabul, Afghanistan
Thank You