Wuxi-made Sunway Taihu-Light maintains the lead as the No.1 system for the fourth time in the world on a list compiled by Top500, a world renowned computer ranking project, on Nov 13, 2017. [Photo/kkj.cn]

Once again, China's Sunway Taihu-Light has topped the latest list of the world's fastest supercomputers, according to Top500's biannual ranking of the world's 500 fastest supercomputers published on Nov 13.

This time China not only taking the first two places, but also pulling ahead of the United States in the sheer number of systems being used.

With a performance of 93.01 petaflops/s (quadrillions of calculations per second), the Wuxi-made Sunway Taihu-Light maintains the lead as the No 1 system for the fourth time.

The supercomputer broke the Guinness World Record for fastest supercomputer in June this year.

China's Tianhe-2, or Milky Way-2, remains the No 2 system with processing speeds of 33.86 petaflops.

Intel chip-based Tianhe-2 had topped the list for three years until it was displaced in November 2015 by Taihu-Light, which was built entirely using processors designed and made in China and housed at the East China city of Wuxi.

Piz Daint from Switzerland, Gyoukou from Japan and Titan from the United States followed China's two supercomputers to make up the Top 5.

It is worth mentioning that China has displaced the United States to rank first in total supercomputers with 202 in the Top 500.

However, it is said that the US Department of Energy is supporting the construction of two new supercomputers called "Summit" and "Sierra", which are expected to be put into use next year.

"Summit" is expected to be capable of performance twice as fast as Sunway Taihu-Light, and it is possible it will replace Sunway Taihu-Light at the No 1 spot in 2018.