According to a UN-Habitat 2016 Report, by 2030, two-thirds of world will live in cities. To make cities sustainable will be one of the top challenges that municipalities around the world will face. Many solutions lie in the global deployment of technologies such as clean tech, smart tech and fin tech. We help to build sister-city relationships between cities in different countries. We advise cities on technology transfer and industrial transformation. We scale up tested sustainable cities solutions through collaborative initiatives. We communicate cities' successful stories to the global communities. We serve as cities' global partner in their sustainable transformation journey.