Kuai Kuai made it to BBC! 乖乖上 BBC 了！
"The bags also cannot be used as amulets beyond their expiration date, so Leng says they are usually swapped twice a year – once during the start of the Lunar New Year, which normally takes place around February, and again during the Ghost Festival in July. And lest you think you can get away with displaying empty bags of Kuai-Kuai, those in the tech world say the snack shouldn't be consumed, otherwise you technically void its protective warranty."