Context : The C-802 is the export upgraded version of the Chinese anti-ship missile YJ-8 (Chinese: 鹰击-8, literally ``Eagle Strike''; NATO reporting name: CSS-N-8 Saccade), first unveiled in 1989 by the China Haiying Electro-Mechanical Technology Academy (CHETA), also known as the Third Academy. 
Question : What was the year that C-802 entered service?
1989