1 sentence

1. 他表面上答应了，却在暗地里阻挠计划的实施。

   tā biǎo​miàn shàng dā​ying le, què zài àn​dì​li zǔ​náo jì​huà de shí​shī.

   He agreed on the surface, but secretly obstructed the implementation of the plan.

   Source: Dong Chinese Dictionary