Ford Motor Company (NYSE: F) said that its sales in China fell 29% in May from a year ago, to 61,744 vehicles, continuing a trend of precipitous declines in sales of Ford-brand vehicles in the world's largest new-car market.Year to date, Ford's sales in China are down 22% from the same period a year ago.Not long ago, this special seven-seat version of the Ford Edge was a hot seller in China.