 Shortly after of the office was established, the first works were already being shown at national and international architecture exhibitions.In 2005 HHF were invited to design a contribution to the "Jinhua Architecture and Arts Park" for the Hong Kong & Shenzhen Bi-City Biennale of Urbanism/Architecture.An invitation followed in 2007 to officially represent Switzerland at the 7th International Architecture Biennale in São Paulo.