Citizens walk in the Baixi Park in Putuo District of Shanghai, east China, Oct. 31, 2021. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Citizens walk in the Baixi Park in Putuo District of Shanghai, east China, Oct. 31, 2021. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a basketball court in the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Citizens walk in the Baixi Park in Putuo District of Shanghai, east China, Oct. 31, 2021. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

A child plays a ball in Baixi Park in Putuo District of Shanghai, east China, Oct. 31, 2021. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]

Photo taken on Oct. 31, 2021 shows a view of the Baixi Park in Putuo District of Shanghai, east China. Transformed from a market built on an old railway branch line, the Baixi Park is now a city park which provides citizens with space for exercise and entertainment. [Photo by Ding Ting/Xinhua]