Apple's first foldable iPhone, the iPhone Duo, hit stores on October 23 with a starting price of 15,999 yuan, making it the most expensive model in Apple's history. On launch day, eager customers lined up, purchasing agents got involved, and scalpers snapped them up at a markup—premiums once reached nearly 3,000 yuan per unit. However, some users reported that within less than two days of purchase, screen failures such as liquid leakage, black screens, and white lines appeared.