Fleur Carson took Yusuf Zuck back to the hospital and told him not to mention anything about last night's incident to anyone other than the two of them.
With such matters, the fewer people who knew, the safer it was.
Yusuf Zuck was well aware of this; he was no fool. How could he possibly discuss such things with others?
The next morning, Samuel Ross made a phone call. He mentioned, intentionally or otherwise, that a residential fire had occurred near the Beijing Film Academy, claiming the lives of five people.
Yusuf Zuck knew that Samuel Ross and Zhu were both highly vigilant; they were no ordinary people.
Of course, he said nothing in return, merely telling Samuel Ross that he had returned and that they should gather that evening, alongside getting some work done, work that had been waiting for several days now.
Samuel Ross simply responded with an "Oh," understanding that the potential danger to Sara Zuck had been eliminated.