| Native Name: | 再生緣 |
| Genre: | Costume drama |
| Starring: | Michelle Ye Raymond Lam Joe Ma Tavia Yeung |
| Opentheme: | "Reincarnated Flower" (再生花) by Kelly Chen |
| Endtheme: | "Remember to Forget" (記得忘記) by Raymond Lam |
| Theme Music Composer: | Gary Chan Lam Yuen Ming |
| Country: | Hong Kong |
| Language: | Cantonese |
| Num Episodes: | 32 |
| Executive Producer: | Poon Ka-tak |
| Location: | Hong Kong |
| Camera: | Multi camera |
| Runtime: | 42 – 45 minutes |
| Company: | TVB |
| Network: | TVB Jade |
| T: | 再生緣 |
| S: | 再生缘 |
| L: | Eternal Happiness |
| J: | Zoi3 Sang1 Jyun4 |
| P: | Zài Shēng Yuán |
| Piccap: | Title screen shot |
Eternal Happiness (Traditional Chinese: 再生緣; literally Reincarnated Fate) is a 2002 TVB television drama from Hong Kong based on a short story of the same name by Qing dynasty novelist Chen Duansheng. Eternal Happiness was produced by Poon Kar Tak and edited by Tong King Ping. The original broadcast was on the TVB Jade network with 45-minute episodes airing five days a week from August 5 to September 13 in 2002. Eternal Happiness was the highest rated drama in Hong Kong for the year 2002 eclipsing some other major productions such as Golden Faith and Where The Legend Begins.
Note: Some of the characters' names are in Cantonese romanisation.
Mang Lai-kwan's (Michelle Ye) father Mang Si-yuen (Lo Hoi Pang) was a royal doctor for the previous dynasty and a learned man, but he is set in his ways and believes that women should not be educated.
Lai-kwan wants to seek knowledge and often dresses as a man to go to school. On her ventures, she meets the royal grandson Temür (Joe Ma Tak-Chung) who is traveling in disguise and also a straight-up young hero Wongpo Siu-wah (Raymond Lam) and the three become adopted brothers.
Temür sees through Lai-kwan's disguise and knows she is a girl, but he does not reveal this; Lai-kwan also has feelings for Temür. Si-yuen decides to marry Lai-kwan to Wongpo Siu-wah, but at the same time, rich bully Lau Fui-bik (Deno Cheung) asks for Lai-kwan's hand in marriage. As the day of the marriage draws near, Lai-kwan decides to tell Temür about her feelings towards him, but Temür is summoned back to the courts and asks Siu-wah to take his place to meet her.
When Lai-kwan sees Siu-wah instead of Temür, she is very disappointed and pushes Siu-wah away. Lai-kwan runs away and on her travels, dressed as a man, causes many laughs and much trouble, getting involved in many different situations. Lai-kwan's feelings develop for both Temür and Siu-wah and are forever changing between the two, especially when she finds out that Siu-wah is actually her fiancé and Temür has become the emperor of the Yuan dynasty.