People watch photos of couples at their golden wedding anniversary at a park in Shanghai, east China, Oct. 25, 2020. A series of activities celebrating the Double Ninth Festival or the Chongyang Festival, were held here on Sunday. (Xinhua/Wang Xiang)

Elder people enjoy flowers at a park in Shanghai, east China, Oct. 25, 2020. A series of activities celebrating the Double Ninth Festival or the Chongyang Festival, were held here on Sunday. (Xinhua/Huang Anqi)

People watch shadow play at a park in Shanghai, east China, Oct. 25, 2020. A series of activities celebrating the Double Ninth Festival or the Chongyang Festival, were held here on Sunday. (Xinhua/Wang Xiang)

Elder people perform on stage at a park in Shanghai, east China, Oct. 25, 2020. A series of activities celebrating the Double Ninth Festival or the Chongyang Festival, were held here on Sunday. (Xinhua/Wang Xiang)

People buy cakes at a park in Shanghai, east China, Oct. 25, 2020. A series of activities celebrating the Double Ninth Festival or the Chongyang Festival, were held here on Sunday. (Xinhua/Wang Xiang)