It is true that you cannot bring the dog directly on the vehicle, but you can put the dog in a cardboard box or cage, and then you can carry the cage to enter the station. However, if it is a big dog, you cannot place it on the vehicle; it has to be put in the compartment for large luggage on the bus. Remember the cage must be ventilated. If it is a small dog, and there are not many passengers, you might take it on board without the driver knowing. Remember not to let it bark, otherwise if the driver or ticket seller finds out, they will ask you to put the dog in the compartment for large luggage. Hengxian is not far from Nanning. I once brought a dog back from Guilin, placed it under the cargo box, and I was worried there was no air inside during the journey, but when I arrived at Langdong Station, it was still fine.