China, Vietnam to finish land border demarcation by 2008 China and Vietnam agreed on Wednesday to speed up the process of land border demarcation and work closely to ensure that the work will be finished and a new border administration document signed by 2008 on schedule. China, Vietnam pledge to enhance mutual trust China and Vietnam, as well as the Communist Party of China (CPC) and the Communist Party of Vietnam (CPV), pledged on Wednesday to boost mutual trust and step up cooperation, said a joint statement issued by the two countries.