The team coached by Takeshi Okada took victory by a 3-1 margin, with Song Wang putting them on their way with a second-minute opener.
Gao Di made it 2-0 after 32 minutes, before former Everton and Portsmouth striker Aiyegbeni Yakubu narrowed the gap a minute before half-time. Xuan Cao sealed the points for Hangzhou by netting in the 52nd minute.
Argentinian Patricio Toranzo netted the only goal of the game after four minutes as visitors Shanghai Shenhua won their derby against Shanghai Shenxin.
Having started the season on minus six points, following the discovery of a match-fixing scandal dating back a decade, Shanghai Shenhua now stand on minus two.
They are still two points better off than Tianjin Taida, themselves subject to the a six-point deduction after the same probe into fixing. Sunday saw Tianjin Taida grab a late equaliser to draw 1-1 at Liaoning.
Liaoning went ahead through Edu in the 32nd minute but Yang Cao grabbed a leveller in the 90th minute.