Interesting as there doesn't seem to be such a company as stated...

Interesting as there doesn't seem to be such a company as stated in the WHA announcement "Shandong Weihai Port International Trade Co Ltd (Shandong)."

The closest matches I can find are:
1. Weihai Port International Trading Co Ltd (Shandong)
2. Shanghai International Port (Group) Co., Ltd

Maybe a typo, maybe my poor search abilities or maybe something else....who knows.

As to whether it is a chinese SOE or not here is a reference to the SOE's and government structures including regions, municipalities and provinces. Inside these references it breaks down to the various SOE or delegated SOE authorities and even then the name put forward by WHA is not represented.
https://en.wikipedia.org/wiki/List_of_state-owned_enterprises_of_China

And for those seeking relativity here is the Australian one.
https://en.wikipedia.org/wiki/State-owned_enterprises_of_Australia

All interesting when you dig a little deeper. Perhaps someone who is concerned can ring the company and seek clarity or ask for clarity to be afforded to the market.