Group 1 - The core shopping method for young people is primarily online shopping due to its convenience and lower prices [1] - A new type of scam in online shopping has emerged, with 9 out of 10 people falling victim to it [2] Group 2 - Pre-sale practices have become common, where merchants only produce items based on the number of orders, leading to long wait times for consumers [5][7] - Many pre-sale items have inconsistent quality, causing dissatisfaction among consumers when the received products do not match expectations [9][10][11] Group 3 - Live-stream shopping often results in receiving products that differ significantly from what was showcased, as the items are typically mass-produced with lower quality materials [13][15][17] - Consumers are advised to check reviews and consider purchasing items with shipping insurance to mitigate risks [21] Group 4 - The trend of buying "one-of-a-kind" clothing items can be risky, as many are sourced from discarded clothing without proper cleaning, posing health risks [23][25][28][30] Group 5 - Promotions like "0.1 yuan flash sales" often involve low-quality, potentially unsafe products from unknown brands, which can pose health hazards [32][34][36]