Complex sentence: Line 4 will start in the norh of Suzhou, west of line 2 at Wanggengshang station and go to Wangshan road in the southwest of Suzhou.
Split into simpler sentences: Line 4 will start in the north of Suzhou, west of line 2. It will travel from Wanggengshang station via Wangshan road in the southwest of Suzhou.