"Grass!" Liu Siyi exploded into a foul language and said directly: "Since Long Hao is not there, then your president is not there?" I think he must remember me. ”

"Wait a minute, I'll give you a call and ask." The staff directly picked up the phone and dialed it, and when they heard the tone, they knew that the person on the other side was definitely not the president, but the secretary or something. After a while, the phone rang again, and after the staff answered, he said: "The president is on the eighteenth floor, and there will be a special person to receive you after you go up." ”

"Okay, thanks." Liu Siyi said politely and turned to leave.

I took the elevator to the eighteenth floor, and as soon as the door opened, there was a beautiful woman waiting at the door.

"You're my brother's classmate?" As soon as the beauty saw Liu Siyi, she asked in a scrutinizing tone.

"If your brother is Long Hao, that's right." Liu Siyi also looked at the beauty with the same gaze and replied lightly.

The beauty is very beautiful, very tall, not wearing high heels and more than 1.70 meters, big eyes, no grease powder melon seed face gives people a healthy feeling, and a denim outfit perfectly sets off her slender figure. It's a pity that her eyes are scrutinizing, and her short ear-length hair is not the type that Liu Siyi likes. So......

Since you are acting unfriendly, then why should I be cheap and close to you!

"Come with me." After the beauty finished speaking, she didn't wait for an answer, and turned around and left directly. Liu Siyi followed behind, looking at the other party's graceful back and straight buttocks, and couldn't help but shake his head secretly, this kind of woman, no matter how beautiful she is, Lao Tzu doesn't want it, if anyone marries back home, she will definitely not have a good life.

When he followed the beauty into the president's office, Liu Siyi saw the people inside and found that a small family gathering was going on here.

No wonder the secretary is not there, and the reception is also Long Hao's sister.

"Uncle Long, Auntie, how are you." Liu Siyi took the initiative to say hello, after all, he is an elder and he is familiar with it, and the politeness he should have is still a must.

Uncle Long is naturally Long Hao's father, and he doesn't know how he treats outsiders, but every time he sees him, his attitude is very kind. Long Hao's mother is dressed in an extremely fashionable way, although she is almost fifty years old, she looks like she is in her thirties, and she also takes great care of him. During the period when Liu Siyi's parents died, he also told Long Hao to care more about him, for fear that he would damage his body, and often brought him some meals and snacks.

It's just that, after all, the relationship has not reached that level, although he knows that they are very good to him, Liu Siyi always feels that there is a layer of separation.

In addition to Long Hao's parents, there is also a middle-aged uncle with a strong body here, and the beautiful woman who calls herself Long Hao's sister sits next to him, looking very affectionate.

What is the relationship between these two? Could it be that this beauty likes this strong type of mature **?

"It turned out to be Xiao Yi, this is my younger brother, this is my niece, they are all my own family." As a middle-aged woman who can mix well in the shopping mall, which one is not a strong woman with a clear mind and exquisite faces, Liu Siyi immediately noticed the strange eyes of the two of them, and introduced quietly.

"Uncle, hello, I am Liu Siyi, a classmate of Long Hao, and I will ask my uncle to take care of me more in the future." Liu Siyi nodded in greeting and smiled kindly.

"It's easy to say, I just exercise a lot, so I look more powerful, but I can't really fight, hehe~" ** looked more humorous, and laughed first as he spoke.

"Uncle, you are so humorous, hehe~" Liu Siyi also smiled, and couldn't help but glance at the beauty on the side, why is the gap between father and daughter so big?

"Xiao Yi, you rarely come, I heard that you and Xiao Hao have business to discuss, but unfortunately he traveled abroad, you can talk to me about any business, I'll call the shots." Uncle Long said very angrily.

"Uncle Long, if it weren't really a little urgent, I wouldn't have come to you. But ......" Liu Siyi frowned, and said with a little hesitation: "This business is related to some secrets, I hope Uncle Long and Auntie, as well as Uncle and this young lady don't tell it." ”

"It's so ugly to speak, you're Miss!" The beauty looked extremely angry and turned her head away from him.

"Hehe, Xiao Yi, this is all my own family, I can guarantee the confidentiality of this business with my personality, even if the business fails, I won't leak half a word, you won't even believe your Uncle Long, right?" Uncle Long was very serious at first, and then asked with a smile.

"Uncle Long said it was funny, how could I not believe your words." Liu Siyi said, took out a diamond from his pocket and put it on the president's desk.

As soon as the diamond was released, it immediately attracted the eyes of the four people, and all of them lit up, but then there were more puzzled expressions instead of joy.

"Xiao Yi, do you know how big the biggest diamond in the world is at the moment?" Without waiting for Liu Siyi to answer, the aunt picked up the diamond and asked herself: "At present, the largest cut diamond in the world is the Star of Africa, which is about the size of this egg and weighs 530.02 carats, which is set in the scepter of the King of England. And your diamond is cut very beautifully, but the size is actually comparable to raising eggs, the weight should be above 800 carats, or even 1000 carats, do you know the value of this diamond? ”

"Humph! It turned out to be a fake, how could my brother do this kind of business with you? The beauty mocked in a low voice of disdain.

"Auntie, don't be too busy jumping to conclusions, is it a diamond, I think you will be able to detect it, right?" Liu Siyi didn't explain much, although he firmly believed that this was a diamond, but whether there was any difference between the diamonds of the two worlds, he didn't know this, so his confidence was not so full.

"Detecting the authenticity of a diamond is as simple as a magnifying glass and a few aids. I'm actually very impressed to see such a big diamond, and since you have the confidence to think it's real, I'll test it now. Auntie said with a smile.

"The test method has to understand the characteristics of the diamond itself. Diamond, also known as diamond, is the only gemstone in the world composed of a single carbon element, is the hardest known natural substance, and has a high collection value. High-quality diamonds usually have the following characteristics: white color, large particles, transparent crystals, high purity, and well-behaved lathes.

Generally, there are seven methods of manual inspection, the first is the simplest, which is to exhale at the same time on the surface of the diamond and the imitation diamond, and the water mist condensed on the surface of the real diamond will evaporate faster than the water mist on the imitation diamond, which is the test method according to the principle of 'high thermal conductivity' of the diamond. With that, the aunt flipped the back of her hand, put the diamond and her diamond ring together, and then drank a sip of hot water from the cup next to her, and exhaled a hot breath on the surface of the two diamonds.

When the aunt did the inspection, Long Hao's sister had already arrived at her side, wanting to see the other party's joke when the diamond was identified as a fake.

"Auntie, the mist is dissipating almost quickly?" The beauty's eyes widened in surprise.

"Well, this experiment can only prove one of the characteristics of high thermal conductivity, but it doesn't mean anything, so let's move on to the second test.

The second is also very simple, called the water drop test, which is to drop a drop of water on the table of the diamond, if the water droplet bulges for a long time, it is real, and if it spreads quickly, it is fake. Because diamonds are lipophilic and hydrophobic, water droplets on the diamond will remain spherical for a long time, while water droplets on imitations will disperse quickly. The aunt casually used a piece of waste paper to suck water from the cup, and then dotted it on the diamond, and the water droplets immediately bulged to form a sphere.

"Well, the hydrophobic properties are obvious, and the lipophilic properties can only be felt by experience. Because diamonds have a certain affinity for grease and dirt, and it is easy to absorb oil stains, there will be a sticky feeling when you touch the diamond with your hands. In my experience, the lipophilic and hydrophobic properties of this diamond are evident.

The third is the single refractive test of diamonds. Natural diamonds have a single refractive nature, so you can't see the handprint when you put it on your hand, while fake diamonds can. As she spoke, she placed the diamond in her palm and looked at it with a magnifying glass.

"The single refractive nature of a diamond is determined by the nature of the diamond, and most other natural or man-made gemstones are birefractive. When viewed with 10x magnification, it is easy to see that the edges and corners overlap from a slightly oblique angle of the front and show two underlights at the same time.

Huh~ It's actually monorefractive. The aunt sighed lightly and said, "As I said earlier, most of the man-made gemstones are birefractive, so this test also can't represent anything." ”

"I see." The beauty seemed to have found the truth, nodded self-righteously and said: "Well, maybe it just so happened that this fake diamond is made of a lipophilic and hydrophobic high thermal conductivity diamond made of a single refractive diamond, so it was not detected." ”