Chinese lasers usually ship with everything you need to get your laser up and running. However, there are four critical areas where Chinese lasers tend to be weak, and as a result, most people end up upgrading or adding components. They are the cooling system (chiller), the air-assist, and the exhaust fan. The machines also lack an ammeter. Below I discuss these upgrades, and why I strongly suggest you purchase them at the same time you buy your laser.