liǎng guó / jīng guò / duō cì / tán pàn / zhōng yú / kāi shǐ / le / shí dì / kān jiè / gōng zuò

两国经过多次谈判，终于开始了实地勘界工作。

After many rounds of negotiations, the two countries finally began the on-site boundary survey work.