17-Year-old Cheng Miaomiao (played by Sun Qian) and 16-year-old Cheng Yaya were born in the No. 1 Oil Production Plant of Linqi Oilfield. Three generations of their family are oil field employees. Their father Cheng Pengfei (played by Tian Yu) is an otolaryngologist, and their mother Jia Daiyu (played by Liu Lin) is a team logistics. The family moved from the northwest to the seaside base town of Heping.
