BEIJING, March 5 (Reuters) - China unveiled its 15th five-year plan on Thursday at its annual parliamentary meeting, outlining Beijing's priorities for the economy and sectors slated for policy support and funding. Here's a ‌summary of what matters for commodity markets: METALS AND CRITICAL MINERALS * China singled out its competitive edge in ‌rare earths forthe first time in a five-year plan, pledging to maintain itslead and upgrade the industry. * Beijing also said it would improve ​its export contr ...