BEIJING — The saving opportunity with the rural bank in central China looked, to Sun Song, a 26-year-old-businessman, like a great find. It would be linked to his existing account at a large, reputable state-owned bank. The rural bank was also offering high interest rates, making it seem like an ideal place to park his roughly $600,000 in savings.Then the bank abruptly froze his account this year, and officials said they were investigating potential fraud. “I owe money on my credit card and have to repay my car loan,” he said. “I have two sons. They’re all waiting.”The financial scandal ensnaring Mr. Sun and thousands of others across the country could pose a serious test …
