Hello everyone! My friend and I are thinking about hitchhiking from Shenzhen to Yunnan this

December. Could anyone share what we should keep in mind? We study in Hong Kong, and so what should we expect when crossing the border and how should we describe our situation to the customs officers? Where should we try to find a ride cuz I have read it's not allowed for pedestrians to be on the expressways. Any advice is welcome! Thank you in advance!