China Southern Airlines, the carrier with the widest fleet in the Asian Country, announced it has signed an agreement with Boeing to purchase six B-777F freighters. As of the end of May 2006, the carrier operated 259 modern Boeing 777, 747, 757, 737 and Airbus 330, 321, 320, 319 and 300 jet aircraft serving more than 600 domestic and international routes with destinations to 142 cities throughout China,...