The State Department's website [1] (页面存档备份,存于互联网档案馆) gives the date as June 30, 1985, but given the context, this appears to be a typo for 1989.
Department Of State. The Office of Electronic Information, Bureau of Public Affairs. Dobbins, James. 2001-2009.state.gov. [2019-11-12]. (原始内容存档于2021-12-07) (英语).
web.archive.org
The State Department's website [1] (页面存档备份,存于互联网档案馆) gives the date as June 30, 1985, but given the context, this appears to be a typo for 1989.
Department Of State. The Office of Electronic Information, Bureau of Public Affairs. Dobbins, James. 2001-2009.state.gov. [2019-11-12]. (原始内容存档于2021-12-07) (英语).