In 2018, there were 14,415 high-tech companies in Shenzhen, of which 3,158 were newly-opened. Shenzhen ranks first in Guangdong Province and second in medium- and large-sized cities nationally in terms of the number of high-tech companies. In 2018, the output value of the high-tech industry was 2,387.171 billion yuan, a year-on-year increase of 11.66%; the added value of the high-tech industry was 829.663 billion yuan, an increase of 12.73% year-on-year. Many of Shenzhen's science and technology enterprises have relied on innovation in science and technology to develop into industry leaders through global competition. Shenzhen's main high-tech industrial zones/parks include the Shenzhen High-Tech Industrial Park, the Shenzhen Software Industrial Base, and Shenzhen Cloud Park. Two of the better known Shenzhen-based high-tech enterprises are Huawei and ZTE.