Sales at General Motors Co (NYSE: GM) and its joint ventures surged 26% to 310,765 units in China in January. Sales at GM's joint venture with Shanghai's SAIC Motor rose 24.3% to 154,220 units, while sales at the company's joint venture with FAW Group climbed 84.5% to 4,490 units. GM shares fell 0.04% to $27.95 in after-hours trading.