The African community in the southern Chinese city of Guangzhou is on edge after widespread accounts were shared on social media of people being left homeless this week, as China's warnings against imported coronavirus cases stoke anti-foreigner sentiment.

In Guangzhou, Africans have been evicted from their homes by landlords and turned away from hotels -- despite many claiming to have no recent travel history or known contact with Covid-19 patients.

CNN interviewed more than two dozen Africans living in Guangzhou, many of whom told of the same experiences: being left without a home, being subject to random testing for Covid-19, and being quarantined for 14 days in their homes, despite having no symptoms or contact with known patients.

Fears of an imported second wave.

This comes amid heightened media coverage of the so-called second wave of coronavirus cases, emanating from infections outside China.

Earlier this week, Chinese President Xi Jinping urged authorities to carefully watch for imported cases from ​other countries, state news agency Xinhua reported.

The fears aren't unfounded -- Hong Kong, not far from Guangzhou, has been hit hard by a second wave. At the start of March, there were only 150 cases in the city of 7.5 million, suggesting the crisis had eased. Now it has 990 cases -- and many were imported from overseas.

Yet these imported cases aren't foreign citizens.

90% of China's imported cases are people with Chinese passports, said Vice Minister of Foreign Affairs Luo Zhaohui on March 26.