When Fang Da brought his girlfriend home to visit his mother, he was seen opening the door with his left arm, when it's already been established that he lost his left arm from the earthquake.
When Fang Da and his girlfriend are driving along the freeway, the year is stated to be 1995 but there is clearly visible a MY 2005 VW Jetta through the driver side window.
During Wang Deng's visit to the Buddhist temple, her boyfriend was seen checking his cellular phone. At the time of the event, approximate 1986-1990, cellular phone use is not widespread in China, especially among college students. The size of the mobile phone was also significantly larger in their early development.
Chinese New Years Holiday celebration 1997 seen on the TV set. The first flat screen CRT television was brought to the mass market by Panasonic in November of 1997. Chinese New Year 1997 would mean February of 1997. It is also not of a Pansonic brand TV.