In the 2018 Sinopec recruitment, don’t PhD students need to take the preliminary examination? Does anyone know?

The Sinopec campus recruitment examination publishes recruitment announcements in late October every year, and registration begins in November; the written examination is usually held in mid-to-early December, and the interview time is organized by each unit itself, starting one week after the written examination , there are units organizing interviews until February of the following year.

I took the exam last year and applied for positions in two units, one of which was accepted in December last year