The real question that begs for explanation: The new lending law doesn't come out from nowhere. It was not drafted overnight, and was not drafted without the consultation of the target of regulation -- in that case, I'm also sure (but without hard proof as I'm just nobody) that Ant was one of the companies that the government inquired. So the real question is: Did Ant know about the regulation when it files for IPO, and if so, why didn't it disclose it?
A second question is: Ant and similar countries have been growing for years and years. Why does the government slam down the regulation in this year? This might not be a legitimate question though, as regulations usually come far behind, so it might be reasonable for the government to act slowly in this case. But still, I believe it's about time that some anti-monopoly law fells on head of companies such as Ali and Tencent. They are wayyy more powerful than they appear to be.