Even though Zhang Heng and Holmes had been getting along quite well, the two had only known each other for a few weeks and hadn't yet developed a deep friendship. After Zhang Heng's attempt at persuading the latter, he said nothing more the next time they saw each other. After all, they were all adults, old enough to be responsible for their own actions.
Zhang Heng heaved a massive sigh before he left the house.
"You rarely come to London, so go out more often when you have time. Don't just see the city; observe each detail, and keep a record of them. It will help with solving any upcoming cases."
"Mm, I asked Mrs. Hudson to bring you lunch," answered Zhang Heng.
"Thank you."
...
