Zhang Lan entered Mabah Rolls' kitchen and was exposed for not having a health certificate during a live stream.

Recently, the controversy stirred by Luo Yonghao's criticism that "Xi Bei is all pre-made food" has sparked heated discussions online. Both sides continue to voice out, and the storm continues to escalate. Zhang Lan led her team into the kitchen of Ma Liu Ji in a live broadcast to prove that their food is not pre-made, but they were exposed to have no health certificate and cutting vegetables without washing their hands.