Xinba's own sanitary-pad brand tested positive for a carcinogen — he quit streaming

Mianmima was a sanitary pad brand Xinba founded in 2017 and sold above all through his own streams, marketed around a tea-polyphenol 'antioxidant chip' and claimed to have tens of millions of users. It had an earlier life as ZUZU, sold through WeChat commerce with his wife Chu Ruixue as its face. In Xin Xuan's ¥50 billion sales year of 2023, it was one of the in-house blockbusters.

In July 2025 reports from consumer-organized group testing surfaced: batches of Mianmima pads produced between September 2019 and January 2025 had tested positive for very high levels of thiourea, a recognized carcinogen. Hundreds of consumers reported health problems after use, and more than 30 users publicly said they had developed thyroid cancer, several with years of purchase records. On July 24 the brand answered with a statement: products 'assessed as risk-free', sampling inspections passed. The Paper noted that the May test report the company brandished contained no thiourea figure.

On the evening of August 18, 2025, during Xin Xuan's '818' anniversary stream, Xinba announced his exit from livestreaming, citing health reasons — without once addressing the Mianmima controversy. His wife Chu Ruixue took over Xin Xuan Group; it was his fifth announcement of walking away. He left behind a record that includes the sugar-water bird's nest affair, which ended in refunds-plus-triple-compensation of more than ¥79.7 million, and a ¥1.75 million false-advertising fine in January 2025.