China's securities watchdog has asked Cainiao, the logistics arm of Alibaba Group, to submit additional information about its shareholders and operational structure as the unit seek to list in Hong Kong. The China Securities Regulatory Commission (CSRC) also asked Cainiao to describe its business dependency on Alibaba, and provide details of spin-off plans by Alibaba's other businesses, according to a filing dated Nov. 10 which was reported by Chinese media on Tuesday.