Actually, it is not a complicated matter to query the traceability code. Generally speaking, there is a traceability code that belongs to the brand at the bottom of the milk powder package. Generally speaking, there are two kinds of traceability codes, one is a number, and the other is a QR code. For the traceability code of numbers, you can check it on the official website of its milk powder brand or the safety traceability platform, as long as it belongs to the traceability code number. For the traceability code of two-dimensional code, you need to download a "food safety traceability" software, and then scan it with this software to query its detailed information.