On September 6, 2013, promulgated by the state council of China 201336 "on strengthening the construction of urban infrastructure opinion" file explicitly pointed out that, by 2015, the national center for urban basic form to 500 (or 330) kv ring net frame, most cities built 220 kv ring net frame (or 110). With the rapid increase of city electricity consumption, the need for urban power grid upgrading. In recent years, many big cities such as Beijing, Shanghai, nanjing and the center city of the 110, 220 and 500 kv loop network reconstruction. Introduce the extra-high voltage power, in the city to the construction of the substation in the city, urban area of extra-high voltage power cable is adopted in ehv transmission lines. This is a very big and very attractive ehv cable market.

In 2012 the new adjustment of the duty-free imports of "not issued, again stated in 220 kv and below power cable is no longer a duty-free imports. 220 and under high pressure in China power cable has a strong production capacity. 110 kv power cables have been localized, 220 kv cable is nationwide, also basically realize the localization, but still need to import 500 kv cable. Big cities like Beijing and Shanghai with the 500 kv power cables for imported products.

Although our country has so many crosslinking cable tower, installed so many VCV production line, and are said to make 500 kv cross-linking cables, but so far, there is no a cable company of 500 kv cable is assured by the users the power sector. And homebred 500 kv crosslinking cable fully recognised by the user, may also need to walk a long way.