Meituan’s profit got wiped out in a price-based battle with rivals Alibaba Group Holding Ltd. and JD.com Inc., the most striking sign yet that its longstanding dominance in a lucrative home market is under threat.Net income plummetedBloomberg Terminal 97% to 365.3 million yuan ($51 million) for the June quarter, despite a 12% rise in revenue. The company blamed “irrational competition” that surfaced during those three months, echoing the concerns of investors who wiped out about a quarter of Mei...