A staff member prepares a display at a shopping mall in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)

People rest while observing social distancing in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)

A worker delivers goods outside a shopping mall in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)

A worker wearing a face mask cleans a display window at a shopping mall in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)

A cleaning robot wipes a handrail of an escalator at a shopping mall in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)

A worker wearing a face mask cleans a handrail at a shopping mall in Singapore, on June 19, 2020. Singapore has entered phase two of re-opening after 11:59 p.m. June 18. (Photo by Then Chih Wey/Xinhua)