Yesterday Universal Beijing submitted construction tenders to build "12 amusement facilities" at the theme park. These tenders include construction on the main structure, building decoration, roofing, building water supply and drainage, heating, ventilation and air conditioning, electrical, and elevators. Groundwork of the site has been completed and I can confirm based on satellite imagery from February 2018 that work on the foundation for multiple ride buildings has already begun including Harry Potter and the Forbidden Journey. I am unable to identify what rides the other buildings will house.
Sources: https://kuaibao.qq.com/s/20180403A19DXG00 and http://www.bidcenter.com.cn/news-48762052-1.html and http://zb.zhaobiao.cn/bidding_v_26654098.html and https://mp.weixin.qq.com/s/6VHDWt64K8j4jwvRYmvSkA