(Bloomberg) -- Traders seeking to navigate the most crucial part of China’s foreign-exchange management are finding visibility getting increasingly cloudy.Most Read from BloombergTrump’s Net Worth Hits $6.5 Billion, Making Him One of World’s 500 Richest PeopleBiden Gains Ground Against Trump in Six Key States, Poll ShowsTrump Vows to Pay Fraud Trial Bond Cut by 68% to $175 MillionVital Baltimore Bridge Collapses After Being Struck by ShipAfter Exposing Realtors, Eliminate the Mortgage Interest D