The auto-control rate of the distributed control systems (DCS) at four major Tianjin Petrochemical Corp production facilities had reached 91 percent, as of March of this year, so its 2013 goal (90 percent) was reached well in advance. In fact, the company has seen real progress in its improvement of the DCS auto-control rate since the very beginning of the year, through the optimal use of technical control parameters, adjustment of process control plans and elimination of control system failures.