Or take N 176 to Dashiqiao, and then take a taxi or carpool from Dashiqiao to Yingkou.
Supplement: If you return to Yingkou the next day, there will be at least 4 buses to Dashiqiao at 6:20-7:48 in the morning, and then there will be many buses from Dashiqiao to Yingkou.
Of course, you can also take a bus directly from Haicheng to Yingkou during the day, which is convenient and inexpensive. The passenger station in Haicheng is on the right side of the railway station.