Key TakeawaysJD.com exceeded first-quarter earnings and revenue estimates on lower prices and increased promotions.The Chinese e-commerce firm benefited from rising demand for grocery items.CEO Sandy Xu said JD.com's focus on user experience boosted the number of active users and engagement. Chinese e-commerce giant JD.com (JD) on Thursday posted better-than-expected results after slashing prices and offering more promotions. The company reported first-quarter adjusted earnings per American depositary share ...