China has various problems regarding to food and environment due to rapid growth of economy. Such issues, especially land use, rice production, heavy metal pollution and rehabilitation of saline soil, have been studied for establishment of symbiotic and sustainable system based on harmony between urban and rural area in Tianjin City in China. New program for land use in urban, sub-urban and rural area is necessary for the sustainable development. New rice varieties of high quality have been developing with less nitrogen fertilizer at China-Japan Joint Research Center for Quality and Palatability of Rice in Tianjin city. New chemical and biological methods for rehabilitation of the soil polluted by heavy metals have been developed. Non-food GMOs tolerant for salinity have been developed to improve soil with salinity in Tianjin.
Tianjin, urban-rural mixture, saline soil, heavy metal pollution, rice production