China bluntly criticized the United States on Saturday one day after the superpower's credit rating was downgraded, saying the "good old days" of borrowing were over. Standard & Poor's cut the U.S. long-term credit rating from top-tier AAA by a notch to AA-plus on Friday over concerns about the nation's budget deficits and climbing debt burden. China -- the United States' biggest creditor -- said Washington only had itself to blame for its plight and called for a new stable global reserve currency. "The U.S. government has to come to terms with the painful fact that the good old days...