Xiao Qing served melon seeds, pastries, and tea, with instructions to entertain Doctor Huang and make sure to keep him at the Canglan Court until His Majesty returned.
Xiao Linzi stood guard at the gate of Canglan Court. As soon as he saw His Majesty returning, he would signal them, and they were responsible for tricking Doctor Huang into the Side Hall. When His Majesty entered, they would surprise him, compelling Doctor Huang to take His Majesty's pulse.
To ensure that no one was prepared in advance, only those in the Side Hall were aware of the plan; all others, including Doctor Huang, were not to be informed.
This was the master's plan.
The master felt that His Majesty was secretive and skeptical about medical advice, and if there was something wrong with him, he might try to hide it from her; thus, she wanted to find out what was wrong with His Majesty.