HONG KONG, Dec 19 (Reuters) - Investors are snapping up yuan credits and surging yuan lending is poised to overtake overseas dollar loans at Chinese banks as attractive pricing helps drive a sustained push by Beijing to put the yuan on the global stage. China's overseas bank lending has tripled in four years to 2.52 trillion yuan and sales of onshore and offshore yuan debt are at or near records for ​the second year running. Bankers say the boom is encouraged by cost, because yuan rates are low. But the ...