Zhao Lijian: Slave trade was an original sin of the US. Slavery remained legal in the US for a third of the country's 246-year history. According to Statista LOL!, a German statistics company, there were nearly 700,000 Black slaves in the US in 1790, and the number exceeded 3.95 million in 1860.

The US issued the Emancipation Proclamation in 1862. However, today, 160 years later, African Americans still find themselves not emancipated from the yoke of racial discrimination. Statistics show that African Americans, who account for less than 13% of the US population, are more than twice as likely to be shot by the police....