"Laugh": Xing smiled when he spoke, which means (those women) laughed and disappeared gracefully into the sea of people.
Extended data:
Laughter source:
Yuan Yu Xia by Qi Ji of Song Xin: a moth, a willow tree and a gold thread. The laughter faded away. Look for him in the crowd. Suddenly looking back, the man was there, dimly lit.
Yingying source:
Yu Yue's Notes on Youtaixiange in Qing Dynasty (Volume II. Lu): In Gusu, Lv You, Chu Shi, I saw a beautiful and gorgeous woman on board. She was fleeting, but she was full of thoughts.
Baidu Encyclopedia-Yingying
Baidu encyclopedia-laughter