Synopsis: Li Yu Chen is a gifted computing engineering student who solves problems using probability theory. He is also warm-hearted and willing to help others, but appears to be cold and uncaring. One day he meets Xia Xiao Ci, a cheerful girl from a very ordinary family. They start out at odds with each other but later find themselves unable to deny their attraction. Also known as: 光年 / Guang Nian 2018 Watch drama online for free.