– Get the biggest business stories [emailed to you] every weekday, or go to the [Fin24 front page] . China is preparing to hit ride-hailing giant Didi with a fine of more than $1 billion to wrap up a long-running probe, media reports said, boosting investor hopes that the country's tech crackdown is winding down. Didi, once known as China's answer to Uber, has been one of the highest-profile targets of the widespread clampdown on the sector, which saw years of runaway growth and supersized monopolies before regulators stepped in. The fine — imposed over Didi's cybersecurity practices — would…