| Native Name: | 淘氣雙子星 |
| Genre: | Modern Drama, Teen, Romance |
| Creator: | Hong Kong Television Broadcasts Limited |
| Starring: | Hacken Lee Paul Wong Yu Sin Man Cutie Mui Steve Wong Aaron Kwok Paul Chun Kiki Sheung |
| Opentheme: | Days Gone By (逝去日子) by Beyond |
| Theme Music Composer: | Wong Ka Kui |
| Country: | Hong Kong |
| Language: | Cantonese |
| Num Episodes: | 10 |
| Producer: | Mui Siu-ching |
| Editor: | Au Koon-ying |
| Location: | Hong Kong |
| Camera: | Multi camera |
| Runtime: | 45 minutes |
| Company: | TVB |
| Network: | TVB Jade |
| C: | 淘氣雙子星 |
| S: | 淘气双子星 |
| L: | "Naughty Gemini" |
| J: | tou4 hei3 soeng1 zi2 sing1 |
| P: | Táo qì shuāng zǐ xīng |
Two of a Kind (; literally "Naughty Gemini") is a 1989 Hong Kong modern teen television drama created and produced by TVB, starring Hacken Lee, Paul Wong, Yu Sin Man, Cutie Mui, Steve Wong, Aaron Kwok, Paul Chun, Kiki Sheung as the main cast and was produced by popular TVB producer Mui Siu-ching. First original broadcast began on Hong Kong's Jade channel July 10 till July 21, 1989 every Monday through Friday during its 7:35 to 8:35 pm timeslot with a total of 10 episodes.[1]
Fed up with being mistreated by his new step-father and his mother not caring Cha Sing Yu (Hacken Lee) boards a plane from the U.S. and runs away to Hong Kong to look for his father. When he lands in Hong Kong he heads to his father's office only to find out his father is away on a business trip but he does run into his fraternal twin brother Cha Sing Chow (Paul Wong) at the office. Sing Yu follows Sing Chow and befriends him, Sing Yu is also able to talk Sing chow into taking him in that night. Sing Yu talks Sing Chow into having fun that night and the two get drunk.
Their dad comes home finding the both of them drunk and that Sing Yu has returned to Hong Kong alone. The next day Sing Yu registered for school where he meets the rest of Sing Chow's classmates. Everyone welcomes him except Sheung Yan Yin (Yu Sin-man), who had an unpleasant run in with Sing Yu the day before. She instantly becomes Sing Yu's enemies but Sing Chow also has a crush on her. Meanwhile, classmate Lee Sai Sai goes out of her way to help Sing Yu to adjust to life in Hong Kong since she has a crush on him.
As Sing Yu, Sing Chow and their friends transition from student to young adult life each face their own difficulty. Sing Yu must choose to follow his dreams of becoming a tennis player or continue his university studies. While Sing Chow comes to terms that Yan Yin does not have romantic feelings for him and must move on with his life.[2]