Dr. Zeng had already received Ling Hua's instructions that if the Emperor summoned him into the palace to reward him, he should accept it calmly. After all, he had indeed contributed to saving Xiao Zhen's life.
Thus, the next day, Dr. Zeng entered the palace and greeted the Emperor with a calm demeanor, not showing the slightest bit of guilt.
Looking at Dr. Zeng, since the night Ling Hua recommended him, this was the second time the Emperor had seen him. Although he called himself an 'old fellow,' he didn't seem as old as other elderly people. Despite being somewhat thin, his eyes were bright and his demeanor was shrewd.
The Emperor inquired, "How long have you been with Ling Hua?"