(Dingmao April 20), May 17, 1987, of a polar research ship is due to arrive in Qingdao.

1987 17 China Being a polar research ship due to arrive in Qingdao.
our Polar a scientific research vessel "Polar" on May 17, 1987 after the successful completion of the task, safety due to arrive in Qingdao. October 31, 1986, aboard the research ship, carrying China's third Antarctic scientific expedition team set sail from Qingdao, and after 199 days of actual inspection, a total distance of 30,921 sea miles.