The main reason is that I didn't expect the demand for this pen to be so great, and the secondary reason is that the chip is out of stock. millet technology limited liability company was founded in March 3, 2010, is focused on intelligent hardware and electronic product development, smart phones, smart electric cars, Internet TV and smart home ecological chain construction of globalized mobile Internet enterprises, innovative technology enterprises. Xiaomi has created the model of developing cell phone operating system with Internet mode and enthusiasts' participation in development and improvement. "Born for enthusiasts" is the product concept of Xiaomi. "Let everyone enjoy the fun of technology" is the vision of Xiaomi. Xiaomi applies the Internet development model to develop products, use the geek spirit to make products, use the Internet model to eliminate intermediate links, and endeavor to let everyone in the world, can enjoy the quality of technology products from China. Xiaomi has built the world's largest consumer IoT Internet of Things platform, connecting more than 589 million smart devices, access to more than 100 countries and regions around the world.MIUI global monthly active users reached 582 million. The Xiaomi family has invested in more than 500 companies, covering smart hardware, consumer lifestyle products, education, games, social networks, culture and entertainment, healthcare, automotive transportation, finance, etc. In June 2019, it was named to the 2019 Forbes list of China's Most Innovative Companies. in October, it was named 56th on the 2019 Forbes list of the top 100 companies in the global digital economy. on December 18th, the People's Daily On December 18, 2019, People's Daily ranked 30th on the "China Brand Development Index" 100 list.2021 On March 30, 2021, Xiaomi Group released an announcement on the Hong Kong Stock Exchange, formally announcing that it had entered the field of car manufacturing. On the same day, Xiaomi launched a new logo.2022 August, ranked 266th among the world's top 500 companies, a significant increase of 72 places. Acquisition of automatic driving technology company Deep Motion Technology, layout of automatic driving core technology. The world's third-largest smartphone maker and also has the world's largest consumer-grade smart IoT platform. It is the fastest growing smartphone brand in the world as well as in China. Lithography (lithography), also known as: mask alignment exposure machine, exposure system, lithography system, etc., is the core equipment for manufacturing chips. It uses a technology similar to photo developing to print fine graphics on a mask plate onto a silicon wafer through light exposure. Photolithography machine brand, according to the use of different technology routes can be summarized into the following categories: high-end projection photolithography machine can be divided into two kinds of step projection and scanning projection photolithography machine, the resolution is usually seven nanometers to a few micrometers between the high-end photolithography machine is known as the world's most sophisticated instruments, the world has 120 million U.S. dollars a photolithography machine. High-end lithography is called the flower of the modern optical industry, its manufacturing difficulty, only a few companies around the world can manufacture. Foreign brands mainly in the Netherlands ASML (lens from Germany), Japan Nikon (intel once bought Nikon's high-end lithography) and Japan Canon three major brands. Located in Shanghai, China's SMEE has been developed with independent intellectual property rights of the projection type of mid-range lithography, the formation of a product series of initial sales at home and abroad. Other series of products are being developed and produced. Production line and R & D low-end lithography for the proximity, contact lithography, resolution is usually more than a few microns. Mainly Germany SUSS, the United States MYCRONXQ4006, and Chinese brands.