BOGO scenario: buy one, get the same item free - GoGoGo 折扣优惠

Use Buy X get Y for a same-product BOGO offer. Customers must add both units before one receives the free-item discount.

Example settings

Setting	Example value
Rule	Buy X get Y
Purchase quantity X	1
Discounted quantity Y	1
Purchase and discount scope	The same test product P
Discount	Percentage 100
Maximum groups per order	1

Configuration steps

Create a campaign and add 买 X 件，另 Y 件减价 (Buy X get Y).
Enter 1 for X and Y, and select product P independently in both scopes.
Choose percentage 100 and set maximum groups per order to 1.
Save and activate. Manually add two units of P before checking out.

Checkout acceptance tests

Test	Expected result
P costs 60; quantity 1	No discount; no second unit is added
2 P	One free unit; total 60
4 P, maximum one group	Only one free unit; total 180
1 P + 1 out-of-scope item	Does not qualify for same-product BOGO

If the system should add the reward automatically, use automatic gifts. These rules have different cart behavior. Then complete the launch checklist. Example amounts use the store currency; shipping and taxes are separate.