Andrew Tsui has been part of a network of individuals and organisations exploring relational thinking. He set up Rooftop Republic in Hong Kong which has been pioneering the urban farming movement over the last five years. They work with companies to develop urban farms on the rooftops of city buildings and support companies in engaging with their stakeholders in the management of the farms and the use of the crops. Rooftop Republic are enthusiastic about the potential for urban farming to transform both urban spaces and mindsets in Hong Kong and to contribute to making the city more sustainable and liveable.