xǐyījī, chōngdiànbǎo, chǔwùguì zhè lèi shèbèi dōu yǒu zìjǐ de èrwéimǎ

洗衣机、充电宝、储物柜这类设备都有自己的二维码。

Devices like washing machines, power banks, and lockers all have their own QR codes.