In order to address the impact of climate change on the city and the transformation for Changhua city regeneration, Changhua County Mayor Wang HuiMei and her delegation arrived in the Rotterdam, the Netherlands, on the 19th. During their stay, they on-site visited Benthemplein (倍恩特姆廣場), Markthal (拱廊市場) and Station Rotterdam Blaak (布萊克火車站) to learn about Rotterdam's public space planning & disaster prevention facilities, BOT joint development and orbital economy of Transit-oriented development (TOD), and further discuss the concepts and practices of sponge city and city sewing redevelopment and transformation. 　　 
 
Rotterdam had been suffering from flooding for a long time, hence, it was urgent to find a space in the city for water accommodation and then build a complex and multi-functional water space. For this reason, Benthemplein, known as “Waterplein” (Water Square), was built. It serves as a public space for urban greenery and recreation during normal times, while in times of flooding, rainwater will be collected into the pools that are originally used as recreational spaces to mitigate the impact of sudden heavy rains. Combining climate change, water resource management and quality of urban life, the Water Square has not only become a recreation place for local residents, but also a new model of sponge city. 
 
“High-density development, the current urban characteristics of Changhua County urban plan, has resulted in limitations on the site choosing for flood detention facilities. In order to achieve the effect of a sponge city, policies may be made to encourage the private sectors to build flood detention facilities. For example, floor area ratio bonus and land use control are good policies to encourage private buildings to have underground flood detention facilities built. By integrating the efforts of the community, the Changhua County Urban Planning Area with dense population and buildings will gradually set the space aside for flood detention to address the impacts of extreme climate,” said County Mayor Wang HuiMei. 
 
The Rotterdam City Government actively put the orbital economy of TOD into practices around Blaak train station by constructing the Markthal market hall in a BOT manner. Under demolition, the elementary school campus made way for the construction of Markthal after relocation of the main campus. Under the collaboration of MVRDV Architects from the Netherlands and the developer Provast’s management team, this public land was revitalized into a new urban typology of commercial space. Taiwan-native architect Liao HuiHsin, who was involved in the planning and design of the Markthal, served as a guide in the on-site visit. According to her, Markthal was completed and officially opened for business in October 2014. It is a new urban typology, a hybrid of housing, business office and market, comprising 228 apartments, 100 fresh food stalls, more than 20 retail units and restaurants, and 1,200 parking lots. It features an arched appearance with a large mural covering the vaulted interior on the arc-shaped walls and dome. Moreover, the huge glass facades on both front and rear sides provide natural daylight and transparency, featuring the market hall spectacular and ventilated with daylight. In addition, it also provides spaces for open-air holiday bazaars, exhibition, performance and events. It has changed the form of traditional open air market, bringing unique aesthetics and life experience to the city and receiving 8 million visitors a year.  
 
“The old urban area of Changhua is about to face the city regeneration and city sewing caused by elevated railway. The orbital economy of TOD is an opportunity to flip the urban axis development of Changhua City. In the future, through the elevated railway in Changhua City and the extension of the Taichung MRT Green Line to Changhua City, the land use intensity around the station will be increased and the hybrid of typologies will be utilized. With the connected space made way by the setback of station’s peripheral buildings and the investment promotion for public land development, a pedestrian plaza may be constructed to comprise the functions of public transportation, marketplace, housing, recreation and entertainment. With the new thinking on the interaction of people between space and environment, the urban space design will be more perfect, livable, and warm,” said County Mayor Wang HuiMei. 
 
Rotterdam's sustainable urban development practice has given Changhua a profound inspiration for urban regeneration. Through this visit, the concept of sustainable development will be further integrated into the urban construction of Changhua County, which will not only continue to enhance the quality and attractiveness of the city, but also bring in detention and flood storage facilities, TOD and spatial planning resilience improvement in response to the crisis of climate change.