Qiu Yanpeng (middle), deputy commander of the PLA Navy, attends a press confer
ence for the upcoming multinational naval activity to mark the 70th anniversary of the People’s Liber
ation Army Navy at the press center in Huanghai Hotel in Qingdao, Shandong province, Ap
ril 20, 2019. About 200 journalists from home and abroad attended the press conference.Chinese Navy
will send 32 warships and 39 aircraft to take part in a joint sea parade in waters near Qingdao.
Nearly 20 ships from about 10 countries will participate in t
he sea parade on Tuesday, deputy commander of the PLA Navy Qiu Yanpeng said.
A Singapore Navy frigate arrived on Friday in Qingdao, Shan
dong province, becoming the first foreign warship to arri
ve ahead of a grand event to honor the 70th birthday of the People’s Liberation Army Navy.
The PLA Navy will hold multinational naval activities in Qingdao and nearby waters from
Monday to Thursday to celebrate its founding anniversary. They will include a joint sea parade, high-level sympo
siums, public tours of ships, military music performances and other cultural exchanges.
Smog in greater Beijing area could be thickened by 15 percent, experts say
Climate change has been making meteorological conditions in the
greater Beijing area more conducive to the generation of haze, and combined with heavy s
mog, the situation could trigger a rapid increase in the concentration of airborne pollutants, researchers said.
The National Joint Research Center for Tackling Key Problems in Air Pollution Control demonstra
ted that without a reduction in the discharge of pollutants, air quality in the Beijing-Tianjin-Hebei cluster
could worsen by about 10 percent and even up to 15 percent in some cities because of unfavorable meteorological co
nditions, the China Meteorological Administration said in a release on Thursday.
Heavy air pollution and a high concentration of particulate
matter is more likely to be seen when wind speeds are lower than 7.2 kilometers per hour, rel
ative humidity is above 60 percent, and there is less than a 500-meter high “mixin
g layer”, which refers to the atmospheric height over which pollutants can be dispersed, it said.
m in which airborne particulate matter is present. The lower the ceilin
g is, the higher the density of pollutants which then mix with the cleaner air.
With a low mixing layer, Taihang mountain range to the west and the Yanshan mountai
n range to the north serve as walls that form a semi-closed “room” in the Beijing-Tianjin-Hebei cluster.
The high level of emissions is the major reason for air pollution in th
e greater Beijing area, and meteorological conditions also play a key role as an exte
rnal factor, said Xu Xiangde, a researcher at the Chinese Academy of Meteorological Sciences.
Zhang Xiaoye, Xu’s colleague, said the “marked effect” of continuous pollutant accu
mulation on meteorological conditions could make overall pollution even worse.
“After the accumulation reaches a certain level, it will further wor
sen the meteorological conditions, which then will further affect air quality, causing explosive