Shanghai has built or renovated another 61 pocket parks this year, taking the total number of such parks to 151, the city's greenery authorities announced on Wednesday. Confronting a shortage of land resources in the city, Shanghai's greenery authorities are making use of existing greenery in the city's corner areas to create pocket parks, the Shanghai Greenery and Public Sanitation Bureau said. Existing trees in good condition are maintained and foliage and flower beds are added, the bureau said.