SEOUL-Hyundai Motor Co., South Korea's No. 1 carmaker, said Thursday that it is moving to build a new production plant in Chongqing, China, that will allow the company to make the next leap forward in the world's largest new vehicle market. The company said its chairman, Chung Mong-koo, will meet with top Chongqing officials Thursday and sign a strategic cooperation pact. Hyundai said the pact will outline…