Song Ci immediately took out his mobile phone and called Xu Che.

"Hello?" Xu Che asked on the other side of the phone, "Didn't you just leave?" What's the matter? ”

"Did the hospital call you? How is Brother Hua? Song Ci asked.

Xu Che frowned, a little puzzled why Song Ci suddenly asked like this, and his tone seemed to be a little wrong.

"What's wrong? Why do you ask? As soon as Xu Che finished speaking, a police officer answered a phone call, hung up the phone and hurriedly ran over.

"Team Xu, the hospital just called, saying that Brother Hua is dead."

"Dead? Didn't you say that it had been rescued? ”

"It was rescued, but after being sent to the intensive care unit, someone sneaked in and wiped Brother Hua's neck with a knife." The officer said, "Just ...... and died......"

"Someone sneaked in? What do the people who keep them in the hospital eat? How can people sneak in? ”

"This ...... I don't know about that...... And...... And ......"

"And what? Fragmented, say! ”

"And, Brother Hua's ...... It is...... Well...... Cut ......"

"What's it? What are you uh? Be clear! ”

"Brother Hua's reproductive organs were cut."

Xu Che: "......"

Song Ci listened to this conversation on the phone, and sure enough, it was the same as she thought, the gift that the 34C young lady said was the life of Brother Hua.

Xu Che pinched his eyebrows with a headache, glanced at his phone, and found that he was still on the phone, thinking of Song Ci's question just now, it was as if he had known in advance that something would happen to Brother Hua.

"How do you know?" Xu Che put his mobile phone to his ear and asked Song Ci.

Not long after Song Ci left, it took at least forty minutes from the police station to the hospital, and it was impossible for Song Ci to rush to the hospital, so this matter would not have been done by Song Ci.

"Someone told me." Song Ci said, "It's not convenient for me to tell you who it is." ”

"What the hell are you doing?" Xu Che frowned.

"I'm not doing anything, Brother Hua was killed, and investigating the murderer is your police's business." Song Ci said, "Also, if you can tell Meng Fan about Brother Hua's death, I think maybe he will cooperate with you." ”

Xu Che wanted to say something more, but when he opened his mouth to ask, Song Ci had already hung up the phone.

Xu Che: "......"

After hanging up the phone, Song Ci took the note given to her by Fang Cai Wenray and studied it carefully.

The cosine of the moon?

What is it?

Guessing game?

Frowning, Song Ci looked at the note in his hand and thought as he walked.

She left a message before leaving.

She said she believed she would find the "Angel of the Night".

So, these five words are to find the information of the "Angel of the Night"?

So what do these five words mean?

Moon......

Cosine......

It's eleven o'clock in the evening, and you can see the moon when you look up.

Song Ci looked up at the moon for a few minutes, then took out his mobile phone and took a picture of the moon.

Today is the seventh day of the lunar month, the moon phase is the new moon, and the first half of the night is the first quarter moon.

If you connect the two sharp corners of the moon into a straight line, then find a point on the semicircle of the moon to form a right triangle......

Suddenly, a flash of inspiration flashed, and Song Ci immediately had an answer.

It turns out that the cosine of the moon means this.

Calculate the cosine of the moon phase for each hour in this way, and you will get a set of numbers, which is the code to find the "Angel of the Night".

……

At six o'clock in the morning, Song Ci wrote down all the numbers on a piece of paper, and through permutations and combinations, he extracted a string of codes.