Yang Yang Bank only charges commission for installment payment.
According to what you said (the statement that the amount you set is 2000 is very unclear), I don't know what kind of business you are handling, but according to my experience, you can apply for automatic installment. When the amount of a single RMB transaction reaches 2000 yuan or more, it will be automatically phased according to the agreed number of installments. If you succeed this time, your consumption amount will meet the requirements in the future, and the system will automatically help you in stages without additional application.
This is the case when shopping in Taobao, because the single transaction amount of Guangfa Card Taobao does not exceed 500, and the minimum processing amount of installment payment of Guangfa Bank is exactly 500, so shopping in Taobao may not be staged. In addition to Taobao shopping, even if your usual consumption amount reaches the staging standard, the automatic staging of a single transaction may be unsuccessful because of other circumstances in the card, which is generally called the comprehensive evaluation is not up to standard.