(Recasts, changes media identifier, adds comments from executives, financial reporting changes) SHANGHAI, Dec 17 (Reuters) - China's Alibaba told its investors on Friday that overseas e-commerce would be a key focus as it looks for new sources of growth after a difficult year at home. Earlier this month, Alibaba Group Holding Ltd restructured its e-commerce business into separate China and international divisions, with the latter to be led by Jiang Fan, head of Alibaba's flagship Taobao and Tmall marketplaces Alibaba Deputy CFO Toby Xu, making his first major public remarks since being named this month to take over as CFO,...