With valuations of $68 billion and $46 billion, respectively, Uber and Xiaomi are the two most-valuable startups in the world at the moment, which means there’s a lot of anticipation surrounding their IPOs. Unfortunately, both companies have refused to give us anything more than an extremely vague indication of when they intend to go public. The closest thing we have to an official date is a statement from Xiaomi CEO Lei Jun at the 2016 World Economic Forum in Tianjin, who says that the company should go public sometime between now and 2025.