Group 1 - The article discusses the challenges faced by foldable smartphones in extremely cold temperatures, particularly in Northeast China, where temperatures can drop to -30 degrees Celsius [10][11][36] - Foldable screens are popular among affluent individuals due to their high price and perceived status, but they are not suitable for use in harsh winter conditions [3][10] - There has been a significant increase in the number of foldable screen repairs in Harbin, as many users experience screen damage when using their devices outdoors in the cold [11][21] Group 2 - The article highlights the unique survival wisdom of Northeast residents, who are accustomed to the cold and know how to handle their devices in winter [26][36] - Foldable screens are made from flexible materials that do not perform well in low temperatures, leading to issues such as screen fogging and liquid leakage [29][33] - The article contrasts the performance of traditional smartphones, which have improved in cold weather resilience, with the ongoing challenges faced by foldable screens [50][55]