- Title: 微微一笑很倾城 / Wei Wei Yi Xiao Hen Qing Cheng
- English title: Love O2O
- Also known as: Just One Smile is Alluring / A Smile is Beautiful
- Genre: Romance, comedy, school
- Episodes: 30
- Viewership ratings: peak= 1.255%, average = 0.965%
- Broadcast network: Jiangsu TV, Dragon TV, Youku
- Broadcast period: 2016-Aug-22 to 2016-Sep-06
- Air time: Monday to Saturday 19:30
- Original soundtrack: Love O2O OST
Story of two popular college students who fell in love through an online RPG game.
- Main Cast
- People at Qing University
- Mao Xiao Tong as Zhao Erxi (Huantian Xidi), Wei Wei's roommate and best friend
- Bai Yu as Cao Guang (Wei Guang), a foreign language scholar who likes Wei Wei
- Qin Yu as Xiao Ling, Wei Wei's roommate
- Song Yi Xing as Tian Sisi, Wei Wei's roommate
- Zhang Chao Ren as Da Zhong, Xiao Ling's boyfriend
- Ma Chun Rui as Meng Yiran, the school's top beauty who likes Xiao Nai
- Zhou Chen Jia as Nana, Meng Yiran's friend
- Chen Jie as Aixiang Nai'er, Meng Yiran's friend
- People in Zhi Yi Technology
- Niu Jun Feng as Yu Banshan (Yugong Pashan), Xiao Nai's roommate and working partner
- Cui Hang as Qiu Yonghou (Hou Zijiu), Xiao Nai's roommate and working partner
- Zheng Ye Cheng as Hao Mei (Mo Zhata), Xiao Nai's roommate and working partner
- Zhang Bin Bin as KO, a renowned hacker
- Hu Hao Bo as Ah Shuang
- People in A Chinese Ghost Story
- Zhang He as Zhen Shaoxiang (Zhenshui Wuxiang), Wei Wei's ex partner
- Guan Xin as Yu Yao (Xiaoyu Yaoyao), leader of Xiao Yu clan
- Lu Yan Qi as Leishen Nini, member of Jade Seas Rising Tide. Wei Wei's friend
- Liu Yu Jin as Diemeng Weixing, ex guild leader of Jade Seas Rising Tide. Wei Wei's friend
- Zhang Tao as Zhan Tianxia, guild leader of Jade Seas Rising Tide
- Yang Xue Ying as Xiaoyu Qingqing, member of Xiao Yu clan
- Liu Qian Yu as Xiaoyu Mianmian, member of Xiao Yu clan
- Song Yu Qing as Xiaoyu Feifei, member of Xiao Yu clan
- Xiao Xiao Bai as Ah Li (Youming Guilao)
- Zhang Hao Yu as Tianxia Dayi
- People in Zhen Yi Technology
- Cheng Hong as CEO Zhen, Zhen Shaoxiang's father and Meng Yiran's uncle
- Leng Hai Ming as CEO Li, Head of the gaming department
- Long Yi Yi as CEO Zhen's Secretary
- Liu Hang Li as HR
- Bian Cheng as Xiao Yang, Wei Wei's tutee
- Cai Gang as Professor Xiao, Xiao Nai's father
- Gu Kai Li as Professor Lin, Xiao Nai's mother
- Fu Jun as Wei Wei's father
- Yang Man Qin as Wei Wei's mother
- Yang Yu Cheng as Xiao Nai's uncle
- Denny Huang as Feng Teng, CEO of Feng Teng Organization
- Liu Gu Hao as CEO Wang, Feng Teng's employee
- Li Xin Ze as Ah Cai
- Lu Yi as Linda, Feng Teng's secretary
- Su Hang as Da Li, Cao Guang's friend
- Zhuang Fu Yi as Cao Guang's classmate
- Gao Ze Peng as Basketball team member
- Ji Li as Game character
- Original writing (novel): Wei Wei Yi Xiao Hen Qing Cheng (微微一笑很倾城) by Gu Man
- Director: Lin Yu Fen
- Screenwriter: Gu Man, Good Story Inc ( Ma Ke Ming, He Xin Ming, Wang Jia An, Chen Ya Mei), Shen Fei Xian, Li Wen Ting, Scarlett OuYang, Lin Qing Yu, Yu Yi Xun
- Company: GCOO Entertainment
- 2017 2nd China Quality Television Drama Ceremony:
- Popular Quality Actor (Yang Yang)
- Innovative Themed Drama of the Year
- 2017 Weibo TV Online Video Awards: Most Commercially Valuable Actress (Zheng Shuang)
- 2016 6th iQiyi All-Star Carnival: Best New Television Actor (Zheng Ye Cheng)
- 2016 Youku Young Choice Awards: Artist of the Year (Yang Yang)
- It is produced and distributed by GCOO Entertainment, which was also behind Boss & Me and My Sunshine. Both are idol dramas based on novels by Gu Man.
- Gu Man who wrote the source novel was also involved with the screenplay.
- Filming took place in Shanghai, China.
- Filming lasted around three months beginning August 22, 2015 and ending November 24, 2015.
- The fictional game in the universe uses the content provided by A Chinese Ghost Story.
- Yang Yang was invited by the game developers of New Chinese Ghost Story to appear for the launching of the game and he showed up to the presscon dressed as Xiao Nai.
- Mao Xiao Tong is a gamer in real life.
- Zheng Shuang tried to get in shape for the role but lost so much weight that she was only 35 kg at the time of filming.
- It is one of the most watched Chinese modern dramas, with over 25 billion views online.
- Unlike most dramas, Love O2O does not succumb to overused cliches and plot devices, making it stand out from dramas with similar themes.