羡慕我的后桌有一个好前桌
[xiàn mù wŏ de hòu zhuō yŏu yī gè hăo qián zhuō]
This username suggests the person envies their classmate who is fortunate enough to sit behind a good classmate (meaning this person might be friendly, smart or helpful). It expresses a light and school-life-related humor.