In the following days, Lin Wanning and Xiao Ruawen both buckled down to study, determined to return to the top tier by the end of the term.
Influenced by this, Xu Qingfan and Xia Xiaoxiao, who used to be content just finishing their homework for the day, also joined the study group.
They cut out the segment of watching TV while doing homework after dinner and, like following school regulations, studied seriously for two and a half hours every evening.
Whenever someone encountered a problem they couldn't figure out, they would seek help from the top students, Xu Qingfan and Xia Xiaoxiao, and in the process receive a thorough review that often uncovered gaps in their knowledge, which was far more efficient than just burying one's head in study.
"This is really simple," Xu Qingfan explained while writing on scratch paper for Xiao Ruawen. "Just open up the brackets. +4ab-4ab forms a perfect square. After transforming it, adding and subtracting cancels it out, see?"