The battle to become the world's largest city in China is a significant one, and it will require both hard work and strategic planning.

Shenzhen is currently the second-largest city in China by population, but it has been struggling to compete with Wuhan, which is the country's largest city by land area. To become the world's largest city, Shenzhen must develop its economy and infrastructure, while also addressing issues such as pollution and urban sprawl.

Wuhan, on the other hand, has already achieved significant success in recent years, and its economic growth is expected to continue. However, there are still some challenges that need to be addressed, including the rapid increase in urbanization and the need to balance development with environmental protection.

In order to emerge as the world's largest city, Shenzhen and Wuhan will need to take several key steps. First, they will need to invest heavily in infrastructure, such as roads, bridges, and airports. Second, they will need to develop their economies, particularly in the technology sector and financial services. Third, they will need to address environmental concerns, such as air pollution and water contamination.

While Shenzhen and Wuhan have made progress, there is still much work to be done. Both cities will need to continue investing in sustainable development and improving their infrastructure, and they will need to work together to achieve their goals. By working together, both cities can become the world's largest city in China, and they will be able to benefit from each other's strengths and resources.