Chen Wei and Su Yunfang are laid-back, but Han Dongchen doesn't trust them enough to leave Su Xiaowan in their care.
When he arrived at the garment factory and found out that Su Xiaowan hadn't shown up, he became even more worried and started searching for her in his car.
Hearing about his cousin's disappearance, their second cousin, Song Yonghui, joined the search. Eventually, they found Su Xiaowan at the People's Hospital.
At that moment, Su Xiaowan was receiving an IV drip, her eyes closed in silence, while Su Yunfang sat beside her, peeling an apple and talking non-stop.
Han Dongchen and Song Yonghui were able to locate Su Xiaowan because they saw Chen Wei's Jeep parked outside the supply and marketing cooperative.
It was a place they often visited. So, if they looked there, they were bound to find someone they knew, hence Han Dongchen and Song Yonghui followed the jeep there.