- Title: 欢乐无双 / Huan le wu shuang
- English title: Double Happiness
- Genre: Historical, comedy
- Episodes: 36
- Broadcast network: Thairat tv
- Broadcast period: 2018-Jun-06
A story about little detectives becoming great heroes as they get involved in a series of cases.
- Jiang Kai Tong as Dong Fangle
- Xiong Nai Jin as Lu Xiaohuan
- Zhai Tian Lin as Li Jianghu
- Wei Qian Xiang as Huang Xiaoyu
- Pan Hong as Xiao Hongchen
- Liu Yan as Queen Zhang
- Liu Yu Cui (刘玉翠) as Cai Xiaomei
- Guo Xuan as Princess Jia Qing
- Liu Zheng Fei (刘正绯) as Jin Wuhua
- Jiang Xi Yuan as Cui Die
- Tian Yu Qing (田雨晴) as Lin Yuyan
- Li Yu as Shangguan Prince
- Da Gang (大刚) as Lin Xiaoyu
- Li Ling as Ling Long
- Xiang Hao as Qing Shu
- Huang Hao (黄浩) as Chen Derun
- Nuo Yao (诺瑶) as Hui Fei
- Hu Hao Bo as Tang Yong
- Lin Chen as Ning Fei
- Liu Yue Xin (刘玥心) as Yu Xiaocui
- Lu Ke Ke as Yang Chenzhi
- Ta La (塔拉) as Mysterious man
- Liu Yu Kun
- Director: Zhong Shu Jia
- Screenwriter: Li Zheng Hu (李正虎), Hu Xiao Shuai (胡小帅), Yu Miao (于淼), Ye Nan (叶楠)
- Producer: Gao Ming Qian (高铭谦), Yin Mu Qiang (殷幕强), Wang Li Feng (王立峰), Li Xing Hua (李兴华)
- Company Production: GOI Media, Jin Niu Huan Teng Pictures, Dongyang Mengjiang Film and Television Culture
- Filming took place in Yongkang and Hengdian World Studios.
- It wrapped in 2014 and on the same year, Jiang Kai Tong and Zhai Tian Lin confirmed that they were dating.
- It is the next big costume drama for Zhong Shu Jia after coming off of the success of Prince of Lan Ling which he also directed.
- The crew created over 60 costumes for Jiang Kai Tong.