On February 1st, foreign media Decrypt issued a post stating that "Li Qiyuan's new hardware wallet Ballet has a fatal flaw". The article states that Ballet is constructed with two QR codes attached to a metal card. The first is a public wallet address. After peeling that QR code, there is a QR code below, which is the wallet ’s private information. key. The article questioned that although Ballet's card is metal, the QR code is not engraved on the card, but is attached to the card as a plastic sticker, which seems to be easily lost. Public QR codes (wallet addresses) are less sticky, and stripping QR codes containing private keys is also easy.