With Shanghai Haichang Ocean Park's "trial operations" set to begin in just hours from now, let's take a look at excellent, brand new aerial photos of the park:
The first photo in this post shows that temporary fencing has been placed in the park to keep guests within a certain area. It can be assumed that at least some of the attractions in the area that is open to guests will be operational. These attractions include the seal/sea lion exhibit and potentially the dome theater, penguin exhibit and conservation/science center.
It is unclear if either of the park's two bridges that cross the creek will be open to guests yet.
Though the Skyway and Steel Dolphin coaster have both been seen testing it is unknown when either will be ready for guests. The entrances/load stations to both rides appear to still be under construction.
For buildings where the exterior is mainly completed, such as the dark ride and Coral & Jellyfish Pavilion buildings, it is unknown whether or not the interior is completed and it is unknown if the areas of the park that those attractions are located in will even be open to guests yet.
Sources: https://m.weibo.cn/status/4289974352893187 and https://m.weibo.cn/status/4289982954960091 and https://m.weibo.cn/status/4290029255695658