Lin Yan rejected Shen Xingye's passionate pursuit due to inner barriers (fear of intimacy, career priority, worry about Shen Xingye's "uncertainty", etc.). When he finally saw his true feelings and broke down the barriers, Shen Xingye had been heartbroken by being rejected and walked away/closed himself/had a new life. Lin Yan had to put down his pride and make great efforts to save it.
