 Good morning everyone. Many thanks to Professor Dili and your colleagues and Professor Ou Yang for inviting me to give this talk. It's such a great pleasure and honor for me. As have shown on the slideshow, I'm Ya Li Jiang from Shenzhen, China. I'm working at the Human Settlements and Environment Commission of Shenzhen Municipality. I am the division head of the Division of Ecological Civilization Construction, a division that focuses on ecological protection, restoration, and construction for the city. In this presentation, I will use Shenzhen, a young mega city in China as an example to talk about the challenges and opportunities on bridging science and policy and how that might make a city a better place. I give you three sections of this talk. First, I will give a brief introduction of the city of Shenzhen, then talk about our challenges and opportunities in ecological and environment work, and at last some of the projects that are designed to address these challenges. As I have known, some of you have been to Shenzhen, but some may not. Here are some quick facts about the city. Shenzhen is a coastal city in Guangdong province, southern China, located within the Pearl River Delta, bordering Hong Kong to the south, and covers an area of 97 square kilometers, pretty much 1.5 times the size of the city of LA. Shenzhen has a warm, humid, subtropical climate. Winters are mild and relative dry, where some of the summer days are very humid and hot. It has a total population of about 12 million in 2016, and its GDP totaled 338 billion last year, ranked the third in China, only behind Shanghai and Beijing. Shenzhen is a young city, and still fast-growing mega-city. As early as in the 1970s, it was a market town. That changed in 1979, when Shenzhen was promoted to city status, and in 1980s, designating China's first special economic zone. Since then, Shenzhen has experienced rapid urbanization and economical development. These figures show the dramatic population growth and the economic development in Shenzhen, since 1979. From these photos, the left one is in 1980s, a small town. The red one, and now, it is a modern mega-city. The following slide shows you the expansion of urban land, and the red ones in Shenzhen. This is what likes in 1985, 90, 92, 95, 97, 2000, 2002, or five, 10, 15, sorry, and last year. It is now a national and international innovation center of high-tech industry. It is home to the headquarters of more than 8008 high-tech companies such as Huawei, Tencent, BGI, and the number of international patent applications is more than that in Germany. It is also a culture and creative industry. Shenzhen is the first city in China to establish the ecological control line that aims to protect 50% of land from development. This pioneer work has led to the design and implementation of the national ecological red lines policies throughout the country. And now, Shenzhen has more than 900 urban parks with first coverage of more than 40%. It also has only urban national nature itself. Among all the mega-cities in China, Shenzhen has the best air quality, and it continues getting better. Shenzhen has set the goal to meet the EU standard by 2020. The right figure shows an inverted U-curve between per capita GDP and number of days with haze in Shenzhen, with the turning point occurred in 2004, and now challenges and opportunities. I am an optimist, so I would like to talk about opportunities. First, I think nowadays is the golden age for ecologists in China. For the first time, ecological civilization construction has been officially added into the constitution of China, and it is widely recognized the value of ecosystem services provided by nature from the central government to local banks. Additionally, there are increasing needs for scientific evidence-based decision-making and policy design. Also, there are many programs for ecological restoration. Our city is still growing, which puts great pressure on the environment and ecosystem. How to protect ecological land from urban expansion? How to continue improving air and water quality with increased pressure in consumption and emission brought about by population growth? And how can we elevate the worst impacts of urbanization or biodiversity? There are lots of concerns and problems remain to be addressed. Another issue I would like to consider as both challenges and opportunity is the gaps between science and policy making. There are a lot of good science and tools, but we need more science and tools that are immediately relevant and easy to use so that science-based policy can be designed and effectively implemented, especially at the local scale. While it might be challenging, there are great opportunities for scientists and policy makers working together to co-develop new science and tools. I think the Natural Capital Project says a great model, and this is so why I'm eager to come here to learn about it. All right now, I'm moving to the last part of my talk. I will talk about a few ongoing projects in which we try to bring scientists, resource managers, and policy makers to work together. So as the head of the Division of Ecological Civilization Construction, I am frequently asked by these questions, what are the ultimate goals of ecological construction and protection in cities? What are the measurable goals? Thinking about my colleagues who are working on air and water pollution control, they have their very clear and measurable goals. For example, by year 2020, the concentration of PM 2.5 deceased to 20 micrograms per cubic meter. But for my division, what are the measurable accountable goals? More trees to concern, percentage cover, birth, richness and diversity, carbon dioxide emission efficiency, they all say something but not all. Fortunately, I have had the chance to work with Professor Ouyang and his term in recent years, and we are more and more clear about our goal. That is to enhance the ecosystem services and human well-being in our city. But again, more science and tools are needed to design effective policy and to take actions. To do so, we need better understanding of the current conditions of the ecosystem. We need tools for measurement and evaluation, and we need to understand the long-term changes. So there are three projects as I will show in the following slides. These projects are designed to help address these issues. The Shenzhen Ecosystem Assessment Project, Urban Invest Model, and Shenzhen Long-Term Urban Ecosystem Observation and the Monitoring Station. The first, the Shenzhen Ecosystem Assessment Project is funded by Shenzhen City and led by Professor Ouyang. He is leading a team with many scientists, some of their colleagues are here. Working closely with resource managers and policy makers. The goal of the project is to understand the changes in the structure and function of Shenzhen Urban Ecosystem and the ecosystem service it provides since 1979. And we are very proud of being one of the test sites for Urban Invest. It will provide tools to support better policy and policy design by incorporating the value of nature into urban design, urban planning and resource management. In addition, we are building our long-term urban ecosystem observation and research station. It is a new platform co-founded by the Ministry of Environment Protection, and now it is called the Ministry of Ecological Environment. Just last week, China and the Shenzhen City have clear goals of supporting decision making. We hope this new platform will become an international research hub for urban ecological research. Our city is the city that is always looking for something new and exciting. It has been a national and global innovation center for high-tech industry. We really hope Shenzhen will be the future innovation center for urban ecological research and build a model for urban sustainability. Thank you very much.