A huge investment from Alibaba may take the valuation of facial recognition developer SenseTime to $4.5 billion. : SenseTime says investors including Chinese e-commerce company Suning.Com and Singapore state fund Temasek Holdings helped close its series-C fundraising round. But the biggest pile-in came from Alibaba, which topped the round up to $600 million. The company would not disclose its total valuation, but "two people with knowledge of the matter" told Reuters it brought SenseTime's value up to around $4.5 billion.