Complex sentence: Li Keyong valued Li Cunxiao and wanted to spare his life; and even as he sentenced Li Cunxiao to death, he believed that other generals would beg on Li Cunxiao's behalf, but nobody did.
Split into simpler sentences: Li Keyong valued Li Cunxiao and wanted to spare his life. Even as he sentenced Li Cunxiao to death, he believed that other generals would beg on Li Cunxiao's behalf, but nobody did.