Is Qin Chuan's biological mother?

No, according to relevant information, his biological mother is Jing Lan (the wife of Qin Gui's first love Guo Liang). These two characters are from the TV series Love You with My Life, also known as Warm Days, which is a warm emotional drama directed by Wang Tao and starring powerful actors such as Shen Aojun, Che and others.