You can buy the original camera from Taobao, the one with turning trajectory, and it will not be lost if it is replaced in situ within 200 yuan. By the way, it is easier to install the traction hook. If you have a chainsaw, you can install it yourself. Buy a good trailer hook, more than 900. I bought it from the vice factory, more than 200 yuan, and it began to rust in three months.