BEIJING, April 18 (Xinhua) -- The following is a summary of published science and technology news of China.

PORTABLE DRUG DETECTOR

The Chinese Ministry of Public Security has passed an appraisal of a hand-held drug detector developed by researchers of the Chinese Academy of Sciences (CAS). The device can give quick test results to identify morphine, methamphetamine and ketamine and assess the quantity.

Independently developed by scientists with the Dalian Institute of Chemical Physics affiliated to the CAS, the portable device is fitted with a small fluorescence detection module and uses a fluorescence labeling reagent to show the test results.

FISH VARIETIES IN YANGTZE RIVER

East China's Jiangsu Province saw a steep rise last year in fish varieties in the local section of the Yangtze River, the latest survey and monitoring data on biodiversity of the river section showed Saturday.

The data, jointly released by the provincial environmental monitoring center and Nanjing University showed that compared with the total 70 varieties of fish recorded in 2018, Jiangsu registered 81 fish varieties in 2020 along the waterway, an increase of about 15.7 percent, suggesting an improving ecological environment in the waters.

ARTIFICIALLY BRED HARBOR SEALS

Five harbor seals born in captivity and three rescued wild seals were released into north China's Bohai Sea on Friday as part of Dalian city's efforts to replenish the wild population.

The five artificially bred seals are still young and required some preparation for life in the wild. Before release, they underwent a month of training on independently hunting live fish, thus increasing their chances of survival, according to Tian Jiashen of the Liaoning Ocean and Fishery Science Research Institute. Enditem

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