It refers to the exchange of source code of equal value between the two parties using currency as the medium.

The packaging of the Chinese version of a2 has the "Zhichu" logo. This logo represents the Chinese version, indicating that it is a formula milk powder specially developed for Chinese babies.

The Australian version does not have this logo, only products with a simple Platinum trademark. Milk powder targets different objects. The formulas of a2 to colostrum milk powder comply with the "China National Food Safety Standard - Formula Food for Older Infants and Toddlers (GB10767-2010)". This regulation is formulated based on the growth and development of Chinese babies and feeding methods.