It's Shandong Weihai Port International Trade Co Ltd which is a...

It's Shandong Weihai Port International Trade Co Ltd which is a subsidiary of (Shandong) Weihai Port Group Co., Ltd.

Here's the official website of Weihai Port Group Co.,Ltd,
http://www.whport.com.cn/new_showcontent.php?cid=73

Here's brief of the group,

Weihai Port is a national first-class open port and is a convenient gateway to South Korea, Japan, North Korea and Southeast Asian countries. The existing staff of 1971 people. It has 18 production berths. Among them, there are 2 berths of 50,000 tons, 70,000 tons and 100,000 tons. The port collection and distribution system is complete, and the railways and highways have been connected to the Internet. In 2016, Weihai Port Group achieved a total operating income of 3.7 billion yuan, a year-on-year increase of 31%.

Here's the group structure chart:



It's clearly a state-owned enterprise: