In 2023, the influence of fast fashion giant Shein has spread globally. Thousands of flights rapidly deliver its ultra-low-priced clothing from suppliers to tens of millions of customers, with '#sheinhaul' videos going viral on social media, attracting billions of views. However, behind this apparent prosperity lies a significant issue regarding environmental sustainability. Shein utilizes proprietary machine learning applications to monitor customer preferences in real-time and predict demand, satisfying these needs through an ultra-fast supply chain.