China's expenditures on logistical services totaled 3.7 trillion yuan ($570 billion) in the first half of 2011, an increase of 18.5 percent year-on-year, statistics showed.   The spending accounted for 18 percent of the country's gross domestic product (GDP), the China Federation of Logistics and Purchasing and the China Logistics Information Center said in a report published on their websites.   The report attributed the growing spending to rising costs for raw m...