1/9  WeChat and Sina Weibo, two of China's most popular social media, have been awash with nostalgia in recent days, as millions of netizens have posted pictures of themselves at age 18. Here is a group of photos bringing back memories of the Pudong district of 18 years ago.Lujiazui of 18 years ago. Jinmao Tower, an 88-story landmark skyscraper in the Lujiazui area of the Pudong district of Shanghai, was once reputed as China’s tallest building from its completion in 1999 until 2007.[Photo by Yao Jianliang]