If you fly from Shanghai, there will be a visa officer on the plane to help you directly. In addition, after you get off the plane in Jakarta and fill out the entry card, you can go directly to the place in the visa on arrival. The same 25 yuan, if you don't understand, you can find some scalpers and the like to handle it for you. Many Indonesians will ask you, you can tip 10-20 RMB. When the customs stamps, you may be asked to tip him. Ignore him. As long as the passport is ok, you can be a little more fierce.