BEIJING, July 3 (Xinhua) -- The following is a summary of published science and technology news of China.

HIGH ENERGY PHOTON SOURCE

The entire storage ring of China's high-energy synchrotron radiation light source in Beijing's suburban Huairou District has recently been completed and linked, according to the Chinese Academy of Sciences' Institute of High Energy Physics (IHEP).

The light source, the High Energy Photon Source (HEPS), was built by IHEP and is a major science infrastructure project in China.

Researchers will commission the storage ring beam following inter-system commissioning, IHEP said.

HEPS is similar to a supersized X-ray machine. It has the ability to accelerate electrons through three stages to emit synchrotron radiation X-rays, which have strong penetrability and a high level of brightness, allowing researchers to observe microcosms.

DARK MATTER HALO

Chinese scientists recently proposed that the current dark matter halo of the Milky Way is "slightly oblate."

In the nearby universe, nearly one-third of disk galaxies are not perfect disks but exhibit a warped shape resembling a potato chip. Astronomers refer to this phenomenon as a disk warp. The Milky Way, as a typical disk galaxy, also has this warp feature.

By "seeing" how the disk warp evolves with age, the researchers found that the warp precesses in a retrograde direction at a rate of 0.12 degrees per million years.

AG600 LARGE AMPHIBIOUS AIRCRAFT

China's independently-developed AG600 large amphibious aircraft has entered a new phase of low-rate initial batch production and final assembly, according to the Aviation Industry Corporation of China (AVIC) on Tuesday.

The large part of the aircraft nose for the first batch-produced AG600 airplane was delivered on June 30, said the AVIC, the country's leading aircraft manufacturer.

The move marked a transition of the type of AG600 aircraft from the phase of development to batch production, the developer added. Enditem

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