BEIJING, Sept. 19 (Xinhua) -- The following is a summary of published science and technology news of China.

TIANZHOU-2 CARGO CRAFT

The Tianzhou-2 cargo craft separated from the rear docking port of China's space station core module Tianhe at 10:25 a.m. (Beijing time) Saturday, according to the China Manned Space Agency (CMSA).

The craft then moved to the front docking port and completed a computer-orchestrated rendezvous and docking. The whole process lasted about four hours, the CMSA said.

DELTA VARIANT TRANSMISSION CHAIN

Chinese researchers have reported the complete transmission chain of the COVID-19 Delta variant and its viral kinetics and clinical characteristics, providing data for the prevention and control against the strain.

The relevant study was conducted by researchers from the Guangzhou Eighth People's Hospital and other research institutes. It was based on an outbreak in May caused by the Delta variant in Guangzhou in south China's Guangdong Province.

Analyzing the epidemiological and clinical data of patients infected with the Delta strain, the researchers found that the Delta variant had a significantly shorter incubation period, higher viral load, and a more extended period of viral shedding.

AGRICULTURAL INNOVATION

The Chinese Academy of Agricultural Sciences (CAAS) has released a plan for promoting key subjects during the 14th Five-Year Plan period (2021-2025), aiming to enhance the country's agricultural sci-tech innovation.

The subjects involve food security, nutrition and health, cultivated-land conservation, disease prevention and control, green development, intelligent agricultural machinery, basic research, frontier and interdisciplinary research, data resources and regional development.