| Chinese city (province) | South Korea City (Road) | Year of establishment |
|---|---|---|
| Beijing | Seoul | October 23, 1993 |
| Shanghai | Busan | August 24, 1993 |
| Tianjin | Incheon Metropolitan City | December 7, 1993 |
| Liaoning Province | Gyeonggi-do | October 4, 1993 |
| Shandong Province | South Gyeongsang Province | September 8, 1993 |
| Jiangsu Province | Jeollabuk-do | October 27, 1994 |
| Hainan Province | Jeju Special Self-Governing Province | October 6, 1995 |
| Henan Province | Gyeongsangbuk-do | October 23, 1995 |
| Heilongjiang Province | Chungcheongbuk-do | September 18, 1996 |
| Zhejiang Province | Jeollanam-do | May 17, 1998 |
| Guangdong Province | Gyeonggi-do | October 20, 2003 |
| Chongqing | Incheon Metropolitan City | unknown |
| Guangxi Zhuang Autonomous Region | Chungcheongbuk-do | unknown |
| Jinan City (Shandong Province) | Suwon City (Gyeonggi Province) | October 27, 1993 |
| Qingdao City (Shandong Province) | Daegu Metropolitan City | December 4, 1993 |
| Nanjing City (Jiangsu Province) | Daejeon Metropolitan City | November 14, 1994 |
| Hangzhou City (Zhejiang Province) | Yeosu City (South Jeolla Province) | November 1, 1994 |
| Guangzhou City (Guangdong Province) | Gwangju Metropolitan City | October 25, 1996 |
| Shenzhen City (Guangdong Province) | Gwangyang City (South Jeolla Province) | October 11, 2004 |
| Wuhan City (Hubei Province) | Cheongju City (Chungcheongbuk-do) | October 29, 2000 |
| Chengdu (Sichuan Province) | Gimcheon City (North Gyeongsang Province) | November 7, 2000 |
| Hefei City (Anhui Province) | Wonju City (Gangwon Province) | November 6, 2001 |
| Zhengzhou City (Henan Province) | Jinju City (North Gyeongsang Province) | July 25, 2000 |
| Nanning City (Guangxi Zhuang Autonomous Region) | Gwacheon City (Gyeonggi Province) | April 18, 2005 |
| Nanchang City (Jiangxi Province) | Naju City (South Jeolla Province) | unknown |
| Xiamen City (Fujian Province) | Mokpo City (South Jeolla Province) | unknown |
| Zhangjiajie City (Hunan Province) | Hadong County (South Gyeongsang Province) | March 31, 2006 |
| Wuxi City (Jiangsu Province) | Gimhae City (South Gyeongsang Province) | unknown |
| Rizhao City (Shandong Province) | Dangjin City (Chungcheongnam-do) | April 23, 2007 |
-Air to Air Heat Exchangers & Waste Heat Recovery Solutions
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