HONG KONG (MarketWatch) -- China Southern Airlines Co. , china's largest carrier, said late Thursday it plans to trim the salaries of its management by 10% this year, and implement other cost-saving measures, in a bid to cut operating costs by 1.3 billion yuan ($190 million) to offset high jet fuel costs. The Guangzhou-based carrier said the cost-cutting program includes an 800 million yuan reduction in infrastructure investment, optimizing fuel usage and changes to scheduling and fleet deployment. ...