My feelings as I prepared for the trip to Hanoi had none of the exultation at a patiently prepared breakthrough that had marked my secret trip to China.

我准备河内之行时，完全没有象那次秘密访问中国时所怀有的、由于耐心的准备而取得突破性成果的喜悦之情。

youdao

This may be one reason why he wanted to keep his trip to China a secret until his train was safely back in North Korea.

ECONOMIST: Kimaraderie, at last