Rob Huff ended Lada's six-year wait for a World Touring Car Championship victory by scoring the Russian manufacturer's maiden win in the reversed-grid race at Beijing Goldenport.
The 2012 WTCC champion exploited his pole position for qualifying 10th in Q2 to the full, but had the required strength of pace to protect his lead from a late threat offered by Dutch veteran Tom Coronel.
ROAL Motorsport's Coronel had good incentive to secure a top finish after witnessing his team-mate Tom Chilton take victory in the opening race.
Coronel resisted the advances of nine-time World Rally champion Sebastien Loeb in the early laps to aid Huff's break, but when the Briton encountered a vibration in the closing laps Coronel narrowed the deficit to a tense 0.765 seconds at the finish.
"At no point before August did I think we were close to this result," said Huff, referring to the intensive development work carried out by Lada in the summer break.
"The first three laps were strong and I was helped by my friend Tommy.
"I was looking at his pitboard that said I had 2.5s gap, and was gauging my pace to that.
"But about three laps from the end I developed a vibration, and I could imagine Tommy's eyes lighting up.
"It is perhaps was my hardest win because of all of the work that has gone into it by the team."
Championship leader Jose Maria Lopez was the most dynamic performer of the afternoon, utilising the speed of this year's dominant Citroen C-Elysee to fight his way up from seventh to fourth.
Lopez's charge took him to the brink of a podium, and the Argentinean took the chequered flag just half a car's length behind team-mate Loeb after the rally ace lost time sliding on dust at Turn 5 on the last lap.
Having taken three points off his title rival Lopez by finishing second in race one, Yvan Muller ended the weekend losing further ground to his adversary in the drivers' standings.
In a repeat of race one, Muller was unable to progress past his former team-mate Chilton, who pegged him back to ninth.
Behind Lopez, Zengo Motorsport's Norbert Michelisz held off sustained pressure from James Thompson to finish fifth.
RESULTS - 26 LAPS:
|1||Rob Huff||LADA Sport Lukoil||Lada||28m52.502s|
|2||Tom Coronel||ROAL Motorsport||Chevrolet||0.766s|
|3||Sebastien Loeb||Citroen Total WTCC||Citroen||3.072s|
|4||Jose Maria Lopez||Citroen Total WTCC||Citroen||3.102s|
|5||Norbert Michelisz||Zengo Motorsport||Honda||8.673s|
|6||James Thompson||LADA Sport Lukoil||Lada||9.938s|
|7||Gianni Morbidelli||All-Inkl.com Munnich Motorsport||Chevrolet||11.111s|
|8||Tom Chilton||ROAL Motorsport||Chevrolet||11.553s|
|9||Yvan Muller||Citroen Total WTCC||Citroen||12.463s|
|10||Gabriele Tarquini||Castrol Honda WTC Team||Honda||12.805s|
|11||Hugo Valente||Campos Racing||Chevrolet||19.571s|
|12||Ma Qinghua||Citroen Total WTCC||Citroen||21.714s|
|13||Tiago Monteiro||Castrol Honda WTC Team||Honda||24.261s|
|14||Franz Engstler||Liqui Moly Team Engstler||BMW||1 Lap|
|15||John Filippi||Campos Racing||SEAT||1 Lap|
|-||Mehdi Bennani||Proteam Racing||Honda||Retirement|
|-||Filipe Souza||Liqui Moly Team Engstler||BMW||Retirement|
|-||Rene Munnich||All-Inkl.com Munnich Motorsport||Chevrolet||Withdrawn|
|-||Dusan Borkovic||NIS Petrol by Campos Racing||Chevrolet||Not started|
|-||Mikhail Kozlovskiy||LADA Sport Lukoil||Lada||Not started|
|1||Jose Maria Lopez||339|