Two years later, in the spring of 1970, mobile phones were already widely used in the military, as well as among the general public. But they are all used by rich people, because the cost of this phone is very high, it costs 10,000 yuan, and you can buy several houses in third-tier cities. Ordinary people really can't afford to spend it.

At this time, if you drive a car, people will think that it is public, but if you take a mobile phone (commonly known as big brother, because it is generally bought by the leading big brother) in your hand, people will know that you are very rich, which has also become a symbol of status and status.

At this time, the country was not as cruel as it was said in history, and everyone did not have to be caught and criticized by young generals when doing business. So some people don't have to hide it when they buy a mobile phone, but take it out and pretend to say, "Hey, hey, you can be louder, you can't hear clearly" can attract a look of envy.

Because Liu Yimiao produced mobile phones in that year, in order to smooth communication, the state also accelerated the opening of mobile phone networks, and two years later, analog mobile phone networks were covered in major cities across the country.

On March 17, 1958, China produced the first black-and-white television set. At 19 o'clock on May 1, 1958, Beijing TV broadcast on a trial basis, marking the first time that China's own television signal was broadcast in Beijing. On September 2, 1958, Beijing TV officially broadcasted it. After the official broadcast of Beijing Television, cultural construction has also been developed accordingly. In recent years, China's scientific researchers have also been slowly exploring the production of color televisions. However, core technologies such as color picture tubes cannot be produced by themselves, and they have to rely on foreign countries. Coupled with economic conditions, color TVs have problems in terms of output, performance, and quality, and cannot be ready-made for climate. Therefore, Liu Yimiao will develop advanced color picture tubes and other components, so that China's color television sets can be put into production as soon as possible.

"Mom, when will our family buy a TV" Tuan Tuan was very envious when he saw the TV set in his classmates. At that time, I also needed TV tickets to buy a TV, and the domestic TV production was not much, and it was very expensive to sell, Liu Yimiao felt that black and white TV was boring to watch, and the picture was distorted, so he never bought it.

"After a few years, my mother will buy a color TV, and it will look good," Liu Yimiao promised.

"Mom, that's going to have to wait a long time" seems to Tuan Tuan to be out of reach, he just envies people with black and white TVs now.

"It won't be long, you believe Mom"

So in the spring of this year, Liu Yimiao went to research and development again. Based on the results of Liu Yimiao's experiments every time, the state decided not to let her go to the university for research and development, and went directly to the national scientific research base. It is heavily guarded and inspected at all levels, and once you enter it, you can't easily get out. This time, Lei Dajun drove her to the door, but this time he didn't let the child come with him. The triplets said they could greet their younger siblings and didn't need to ask someone to take care of them.

After Liu Yimiao entered, she first found the production steps, principles and materials of the black-and-white TV, and after figuring it out, she put forward the materials needed according to the design drawings of the color TV and slowly developed them. Soon, Liu Yimiao developed a sample of a color TV. Many of her achievements have broken the domestic technology gap. The leaders above were all alarmed, and hurriedly made a finished product according to her design concept and design drawings. Looking at the clear color TV picture, many people burst into tears of excitement.

The country also quickly put color television sets into production, and greatly increased the production line and exported it abroad. This kind of TV set is also very popular abroad, and the sales volume is higher than that of the Chinese New Year, because the level of foreign consumption is higher than that of the domestic one, and the sale of color television sets has greatly increased the country's foreign exchange reserves.

Because it was made by Liu Yimiao, the state decided to raise her military rank to colonel. At this time, the state did not propose to abolish the military rank system, so Liu Yimiao became a twenty-five-year-old colonel, still a female comrade, which is also relatively rare in Chinese history.

The first finished color TV was also given to Liu Yimiao by the factory, and when Lei Dajun came to pick up Liu Yimiao, he found that Liu Yimiao had a big box next to him, and he was still dead and heavy when he moved it.

"Oh, we have a big color TV at home" Several children went home and ignored Liu Yimiao, a big living person, when they saw the big color TV, and they were very surprised to look at the picture on the TV.

"Mom, why do you say people on TV move" Kang Kang likes to think

"This TV is also man-made, which means that someone understands this principle, if you are interested in these, you must study hard and understand these principles, so that you will make more useful things yourself," Liu Yimiao earnestly taught. She hopes that the children themselves will be motivated to learn.

"Mom, are the planes and artillery on TV real?" Tuan Tuan is more interested in military affairs, and actively accepts Lei Dajun's training for them at home.

"Mom, I want to buy the skirt of the young lady on TV, it's so beautiful" Miao Miao has loved beauty since she was a child, Liu Yimiao has craftsmanship and knows how to design, so Miao Miao's clothes have always been very beautiful, and they are all made by Liu Yimiao herself, so Miao Miao has been envied by many little girls.

"You can learn to make clothes yourself, how good you can do it yourself in the future, you see that your mother can make clothes, and the clothes you wear are beautiful, aren't the children envious." There are also Tuan Tuan, the planes and cannons on TV are real, but you have to know how to drive them, otherwise you can only watch them, which also requires you to study hard" Liu Yimiao encouraged the children

The children have planted the seeds of learning well, and when these seeds are deeply cultivated and germinated, they will make a different achievement...... Liu Yimiao is so convinced