I want to take a long distance, starting from Guizhou and passing through Guangxi to Guangdong, about 1400 km.

Your trip is ok, but have you ever thought about whether it will be affected by rain or other bad weather during your trip? And your complete set of equipment. What kind of car is your car, mountain bike, road bus or tourist bus? None of this. Finally, I want to say that if you want to come to Guangdong, you'd better not bring a tent. Safety comes first, for example, your money and life are safe when you sleep. In that case, you can bring some cash, not too much, and the hotels here are also very cheap, ranging from 30 to 50, and staying for one night is more suitable. The most important thing is a high safety factor.