Although the WiFi technology has become increasingly popular, but there are still exist some problems. If there are a lot of people connect a WiFi at a time, the internet speed will be very slow, and the wireless signal would become instability. What’s more, not all of places install the wireless network. For its own drawbacks of WiFi, German physicist Herald Haas and his team of the University of Edinburgh invented a patented technology that uses a bunch of flash to transmit the wireless of digital information. This technique commonly refers to visible light communication (VLC). In this way, LED bulbs can quickly transmit binary encoding. But to the naked eye, this type of flashing is not visible, only the light-sensitive receiver can detect it.

Visible light communication technology, the nickname of Li-Fi is not just improving the coverage of the Internet. As the most important technology of wireless data transfer, WiFi use radio frequency signals. However, radio wave is only a small part of the entire electromagnetic spectrum. With demand of users of wireless internet is increasing, the available radio spectrum are increasingly less. For example, when people surf the internet in a cafe, if there are more and more people use the internet, people will find that speed is very slow, which is the same as the 3G mobile networks. At the same time, according to Cisco's data, the amount of information transmitted through mobile devices is doubled every year. Data transfer rate of LiFi network is up to 1GBps, which is 100 times as quick as WiFi.

Once this technology can be improved perfectly, this will be a milestone for network information technology. The accelerating of the transmission speed of the network will help domestic enterprises, such as tungsten communicates with foreign enterprises. And it benefits domestic enterprises to get more foreign tungsten market information, which will bring good economic benefits to the world's tungsten market (tungsten heater).

Our country plays an important role in cemented carbide industry around the world, which is one of the main countries of raw materials and manufacture. Tungsten carbide materials have many advantages, such as high hardness, high strength, good thermal-setting, excellent wear and corrosion resistance and so on, which have been widely used in modern machining tools, wear-resistant materials, corrosion-resistant and high-temperature materials, etc, especially indispensable in tungsten carbide cutting tools. Development status and problems of cemented carbide industry in our country, mainly in three aspects: total production of large, relatively low profit margin; carbide products lack comprehensive export channels; related business technology innovation development is insufficient.

Although China in terms of production of cemented carbide is far ahead in the world, but at the margin is far lower than other developed countries. The main reason is that the domestic carbide products are mainly concentrated in the low-end products; the low degree of processing, low-tech, value-added products is not high, supporting the poor, such as the number of bars, plates and so on. While foreign enterprises focus on high-performance, high-precision and high-end CNC inserts, micro drills as well as some parts of precision instrument, so the profit is dramatically increasing. In terms of export channels, our carbide products export channels the vast majority still remain in the traditional way of wholesalers and retailers a simple intermediate channels. Each member of the channel as an independent economic entity, it will be in order to maximize their own profits, difficult to form a benefit-sharing, risk-sharing marketing model. Therefore, we should adopt multi-channel marketing management according to different carbide industries; design reasonable, flexible product pricing mechanism, keeping the right balance of sales channels; Improve information management of sales channels, improve the efficiency of distribution channels, establish direct marketing system, carbide production enterprises.