The Mahindra Racing driver looked comfortable in the fight at the front and closely followed Buemi for the second stint ready to pounce.
The Swede, who was fortune to complete the distance after a battery change between qualifying and the race, stuck behind the slipstream of the Renault e.dams driver and made a lunge up the inside of Turn 7 to take the lead.
Its the first time Rosenqvist has stood at the top of the Formula E Championship standings, four points clear of DS Virgin Racings Sam Bird who came home in third place. Mahindra Racing also lead the team standings with two wins from three races.
Buemi, who only managed to score a solitary point in the opening two rounds in Hong Kong, showed a return to form starting from the front of the grid from Julius Baer pole position.
However, it wasnt such plain sailing for Buemi as his preparations were hampered by an issue with the water pump. The Renault e.dams engineers had to invert the order of his cars to ensure they could fix the problem and get him out in time.
It was a similar story for Bird, who remained behind the rear wing of Buemi in the opening laps but gave up the position to Rosenqvist after a recurring technical issue caused him to slow down.
Another name carrying over form from Hong Kong was season one champion Nelson Piquet Jr, who equalled his best-placed finish of the current campaign in fourth for Panasonic Jaguar Racing and scored the extra point for Visa fastest lap.
The Brazilian gained a place in the mandatory car swap, coming out ahead of Jose Maria Lopez making his Formula E return with the DRAGON outfit.
Rosenqvists team-mate Nick Heidfeld scythed his way through the pack to finish seventh after hitting the wall during qualifying. Formula E debutant Tom Blomqvist claimed points in his first-ever race for Andretti in eighth.
Race winner Rosenqvist said: "At one point in the day I was going to be settling somewhere in the middle of the mid- field after practice as we were struggling a lot.
"We then made some analysis and in qualifying we found out how to work the tyres properly, so that was a really good comeback before the race.
Disclaimer: No Business Standard Journalist was involved in creation of this content
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