This kind of grass knot is called "Qianqian Knot". He Lingchuan had seen it from Wan Qifeng. Every time he was refining, a pair would be produced. They were within ten miles apart. If one of them broke, the other one would also break.

It couldn't be more convenient for simple messaging.

But it can only do the simplest communication, such as answering "yes" or "no".

He Lingchuan guessed at just one glance that this set of communication probably used two pairs of Qianqianknots. If one pair was broken, it meant there was nothing wrong. If both pairs were broken, it meant something was wrong.

The county magistrate relaxed after hearing this.

The soul-capturing mirror was dissatisfied and said: "Oh, the other side is not using a mirror to illuminate and respond to messages. How can we position it?"

"They used thousands of knots instead of mirrors to reflect light, just to avoid being discovered." He Lingchuan's eyes flickered as he stood on the tree and looked south.

The Vishay people's caution was beyond his expectation. But it didn't matter, his plan could be revised at any time.

"But the distance reflected by the mirror is not far, the second floor of the official office is not high enough, and there are several trees outside blocking it. The flat and short buildings to the south cannot receive this signal at all."

Under the cover of darkness, he began to sneak south.

"So the officers who hold death row prisoners have to stand high so they can observe the reflection in the mirror." He Lingchuan continued his analysis. He had just been to Jucheng yesterday and had some impressions of it. "The streets and alleys in Jucheng are very narrow, uneven and winding.

It is winding and winding, making it inconvenient to transport troops. The county magistrate will not imprison death row prisoners too far, so it is convenient to send troops back and forth to take care of it, so it is at most within 150 feet to the south."

"Even if we narrow the area to 150 feet, there are still many houses, okay? How to find them?"

He Lingchuan explained: "We ate pan-fried cakes in the south yesterday. We know that most of them are bungalows and houses. The only places with a higher view are..."

The soul-capturing mirror responded: "Tower, inn, warehouse, shop!"

Officials are unlikely to hold death row inmates in private homes or operating inns.

There are no high towers in Jucheng either.

Then only warehouses and empty shops will be left?

He Lingchuan jumped on a big tree again and looked to the south: "Jucheng is a small town. The government offices are so bright and noisy that ordinary residents will get up to see what's going on. We were in the south yesterday. Most of the shops are in front of

The house behind the shop is for people to live in."

"So - our target is a three-story or above warehouse or shop without lights within 150 feet south of the county government office!"

Since these officials secretly detained prisoners on death row, they certainly did not dare to turn on the lights at will.

Other residents light lamps, but they may not dare.

The scope is further narrowed and it becomes very specific.

The soul-capturing mirror helped the owner search together, and soon shouted: "Nana, look to your left, there is a three-story small building that is dark!"

He Lingchuan sneaked over and found that this was a closed inn, with half of the signboard missing.

He asked the mirror: "Have you felt the formation or barrier?"

"No."

"Then it's not here." He didn't even bother to go in and turned around to find the next target.

Time is precious.

He Lingchuan was also unlucky and failed twice more, one was a broken warehouse and the other was a vacant carriage and horse stable.
Chapter completed!