An ARJ21-700 plane lands after a test flight at an airport in Dongying, East China's Shandong province, Oct 14, 2017. The Chinese-developed regional jetliner, which has the BeiDou navigation system installed, has successfully completed a test flight, the Commercial Aircraft Corporation of China (COMAC) said Saturday. [Photo/Xinhua] A Chinese-developed regional jetliner, which has the BeiDou navigation system installed, has successfully completed a test flight, the Commercial Aircraft Corporation of China (COMAC) said Saturday. The test flight was carried out from an airport in east China's Shandong Province on Saturday morning. It was the first time a domestically-produced regional jet has been equipped with the BeiDou navigation system. The flight tested the performance of the onboard navigation information receiver, the ground-based signal enhancement system, and the short-message function of the BeiDou system. The results showed the performance of the navigation systems developed by China is on par with similar systems produced abroad, and even reaches internationally advanced level in transient and quick positioning index, COMAC sources said. The BeiDou navigation system has seen increasing numbers of applications linked to everyday life, from shared bicycles to bank cards and unmanned patrol vehicles. silicone rubber bandsblack rubber wristbandspaper bracelet templatewrist band com coupon codemake your own rubber bracelet
SHIJIAZHUANG - The smog-prone northern Chinese province of Hebei has reported fairly good air quality for 66 percent of days since Oct. 1, the best record in five years, authorities said Tuesday.Hebei, which neighbors Beijing, is home to six of China's 10 most polluted cities, including the provincial capital Shijiazhuang, according to a Ministry of Environmental Protection report analyzing air quality in the first 10 months of this year.Levels of PM2.5, a type of airborne particle smaller than 2.5 microns in diameter, in Hebei have fallen almost 40 percent so far compared with the same period in 2013 to an average density of 64 micrograms per cubic meter, outstripping the 25-percent smog control target set in 2013, said Wang Xiaoli, a provincial environmental protection bureau official.Shijiazhuang has had only five days of heavy pollution since Oct. 1, down 38.6 percent year on year, and the city's hourly PM 2.5 density exceeded 300 per cubic meter only once, said Wang.In November, periods of heavy pollution in Hebei decreased by 1,278 hours, and its hourly peak PM2.5 density plunged 38.3 percent compared with the same period last year, said Wang.Under Chinese air quality standards, an air quality index (AQI) below 100 is defined as a good air quality day. An average daily AQI above 200 indicates heavy air pollution.Hebei recorded the worst air quality in 2013, with only 33 percent percent of days with good air quality, according to Wang.Overhauling polluting companies, dismantling coal-fired boilers, and controlling inferior coal have contributed to the decrease.Winter months are known to have the worst smog in north China with Hebei hit hard as the wind slows and residents turn on coal-fired furnaces for heating.
