Alibaba Group's logistics arm, Cainiao Smart Logistics Network Ltd, has filed for its Hong Kong initial public offering (IPO), which could fetch a minimum of $1 billion. Alibaba is currently restructuring, splitting into six central units and transitioning to new leadership. Meanwhile, Alibaba's international e-commerce platform, AliExpress, in collaboration with Cainiao, is set to enhance its delivery services, promising delivery within five working days in selected countries. Cainiao has been proactive in enhancing its logistics network, introducing a half-day express delivery service in major Chinese cities.