 Okay okay thank you Professor Wang for introducing. So this is another and today I would like to talk about Greenway in Guangzhou. We know Guangzhou is a mega city in China and they do a lot of work about Greenway. So either way or no, common green space is very important to citizens and it is generally considered to be all natural, semi-natural and artificial ecological network between the city and the suburbs. So it usually consists of an ecological center and the surrounding are corridors. There are mainly types of urban green space such as Greenway, urban parks, urban forest and as well as wetlands. And the proportion of UGS in people's living environment is positively correlated with healthy perception. For example, it can extend a life span and improve our emotion and relieve mental stress and also can reduce violence conflict. So it is important. But now with the development of urban rapid urbanization and most residents usually live in the urban alleys. So if a fire can be found away from large sites UGS. So large sites UGS is become very limited resources in dense cities such as Guangzhou and the many cities around the world. But small sites, small sites UGS can be very common to see and it can also serve urban residents as an important form. So our research focuses on in Guangzhou city that green surface supply and public demand can match where and for this work we cut it out one year out of the research field in Guangzhou and use the copying correlation mode. So this is the study area. The location is Guangzhou and it is a capital city of Guangdong province. So China and it's one of the four central cities of the Guangdong, Hong Kong, Macao and the Bay Area. The 11 districts in Guangzhou and the city covers an area of more than 3,000 kilometers and holds more than 15 million residents. Guangzhou is the pioneer of the green vehicle stretch in China and is also one of the most representative cities for green vehicle stretching. And at the end of 2020, the total length of green in Guangzhou has listed more than 3,500 kilometers. So I think it's a great work for the local government, especially from the foreign trade department. They do a lot of work and it is very important for the citizens. This picture shows our field investigations last year. And the method we used in the study as far as the first is we constructed an integrated system. Specifically, we used 12 integrates were selected to evaluate the combination of situations of greenway surface supply and the public demand in Guangzhou city. This slide is GSS systems and the right side is PD systems. And the determination of our weight is three parts. And here is the calculation formula and you can see. And the third one is we also determined the carbon coordinated development. We divided this degree into six levels. So each level is different to the balance or unbalanced. And we also do the special auto-correlation analysis to compare the global auto-correlation index and the local auto-correlation index. And the two index were used. The first one is the model I and the second one is the local model I index. And here is the result. And we found the scores in GSS several systems. The supply side, we can find that the effigy of Guangzhou is 0.3. And the hydro-district is the hardest one and the Nansha is south Guangzhou is the lowest one. For the PD systems, we can find that the USU district is the hardest one and Tonghua city is also in the north Guangzhou is the latest one. So when we compare these two values, we come to a very close. It means this supply can meet the people's demand. And the second part of the result is we can just picture shows the GSS supplies. We can find it is a very high score in the center of Guangzhou and several districts show an allegation pattern. And the last picture shows the USU district is the core and the irregular decreasing to the outside of the city. Here is that the copying quality of a degree over the two systems we can find. The effigy of copying quality of a degree is 0.6. It means it is balanced where in Guangzhou, so from the total. And the last result of our show is copying quality of a degree over two systems is a joint trend. So the highest degree is in the central district. This is the very cloudy. It is very densely in this four cities. And the least part is higher than the west. And the south part was higher than the north. This is a general trend. And here is a non-part pattern pattern. So this is from the special auto correlation analysis result. And there was a significant positive special correlation. And so we can find that 12 indicators can closely relate to the greenway surface supply and demand system. So it works. And the weight of each indicator is determined by to the both the actual method and the ARHP method. And the contribution of supply and demand systems, we can find the value. The score though is slow, but it can be very close. It can equal to the systems. So and the score is GSS supply is higher. PD if I see indicating that the greenway surface resources may not fully utilize it. And this is a district belong to the PD substance. It is a rugged type. And the third one is we also find a general pattern and it can be very high supply and very high demand. This cluster is accounted for about one third of all the street. So the modern index suggested that it typically is about 0.5.8. And showing an allegation effective. And the last way we find also find that the surface provided by the greenway can be from meeting the citizen's daily needs. And so but for future, we suggest that more effort is needed, such as implementing the density construction of greenways and improve the quality of greenway supply. And also increasing the less dense population in some rural areas also in Guangzhou. So I would like to thank the funding and thank you for your attention and your understanding.