“A crude approach. Me, all my approaches are clumsy and crude,” Rey Diaz said, with a self-mocking laugh. “I have increased the sensitivity of each node’s monitoring of its own state. Specifically, each communication node is composed of several units that may be separated by a large distance, but are connected into a whole by continuous communication. If any one unit fails, the entire node will issue a command terminating the anti-trigger, after which, even if the false signal source resumes sending a signal to the next node, it will not be acknowledged. The monitoring of every unit can achieve a microsecond level of accuracy, which means that—using the German representative’s approach—every unit of a node must be simultaneously destroyed and the signal resumed from the false signal source within the space of a microsecond. Every node is composed of at least three units, but may have dozens of them. These units are separated by a distance of about three hundred kilometers. Each one is built to be extremely rugged, and it will issue its warning upon any outside touch. Causing these units to fail within the space of a microsecond might be possible for the Trisolarans, but it’s not currently possible for humans.”

His final sentence put everyone on alert.

“I have just received a report that the thing on Rey Diaz’s wrist has been sending out an electromagnetic signal,” Garanin said. The atmosphere of the assembly turned tense at the news. “I’d like to ask you, Wallfacer Rey Diaz: Is the signal from your wristwatch being sent to Mercury?”

Rey Diaz chuckled a few times, then said, “Why would I be sending it to Mercury? There’s nothing there but a giant pit. Besides, the cradle’s space communication link hasn’t been set up yet. No, no, no. You don’t need to worry. The signal isn’t going to Mercury. It’s going somewhere in New York City, very close to us.”

The air froze, and everyone in the assembly, apart from Rey Diaz, stood as shocked as wooden chickens.

“If the signal sustaining the cradle is terminated, what will it trigger?” the UK representative asked sharply, no longer attempting to mask his tension.

“Oh, something will be triggered, all right,” Rey Diaz said to him with a broad laugh. “I’ve been a Wallfacer for more than twenty years, and I’ve always been able to get a few things of my own.”

“Well then, Mr. Rey Diaz, would you be able to answer an even more direct question?” the French representative said. He looked entirely calm, but there was a tremble in his voice. “How many lives will you, or will we, be responsible for?”