So far HCH has had relations with nearly 30 Non-government and Government Organizations of the USA, France, Japan, Holland, Germany, UK, Luxembourg, Italy, Belgium, Canada...
With ALOHA (Hawai) of USA
With JICA (Japan)
With REI group (USA)
In 2007, HCH received 98 international delegations with 505 members coming to HCH for cooperation and exchange in different programmes