Alibaba Group Holding said the destination ranking feature in its Amap mapping service has racked up 400 million users since being launched last month, as the tech giant doubles down on efforts to challenge rival delivery platform Meituan in local services. AdvertisementAmap Street Stars, launched on September 10 to provide artificial intelligence-based rankings for restaurants, hotels and tourist attractions, has so far been used by 400 million users, nearly half of Amap’s monthly active users, Alibaba said on Friday. As of June this year, Amap had 895.5 million monthly active users (MAUs), making it the fourth biggest mobile app in China by MAUs, according to analytics firm QuestMobile. Photo: Shutterstock ImagesAmap’s new ranking feature represents Alibaba’s latest salvo against Meituan, which operates the popular Dianping restaurant rating app. AdvertisementMeituan’s Hong Kong shares have lost 30 per cent since the beginning of this year, while Alibaba’s have gained 128 per cent.