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During Huang's freshman year, he flunked a statistics course, while other students outperformed him without much effort.

Du only realized the true importance of sex education when she attended a related lecture in 2011. In addition to her teaching duties, she was working as a part-time psychological counselor at the school, but six months after the lecture, she quit her job and moved into sex education.

Donghao Lansheng, the expo's operator, and the Council for the Promotion of International Trade Shanghai, will be responsible for the design and management of the online platform.

Downpours and gales are forecast in southern China from Saturday to Monday.

Douglas H. Paal, vice-president of the Asia Program at the Carnegie Endowment for International Peace, said the impact of jacking up the tariffs will raise costs in every direction and possibly leading to a "wrenching and costly" delinking of the US and Chinese economies.