|Type||private Public policy think tank|
|Headquarters||Portion B, 61/F Bank of China Tower, 1 Garden Road, Central, Hong Kong|
|T. K. Ann, Leung Chun-ying, Shiu Sin-por|
The One Country Two Systems Research Institute (OCTS; Chinese: 一國兩制研究中心) is a Hong Kong think tank founded in 1990 by a group of pro-Beijing politicians. It is registered in Hong Kong as private non-profit company with limited liability, and has been granted the status of a public interest charitable organisation by the Government of Hong Kong.
It was founded in 1990 and funded by T. K. Ann and Leung Chun-ying. By 1997 it had around 30 staff and publishes papers and books on a range of topics relevant to transitional issues. It was headed by Shiu Sin-por.