More businesses will be allowed to reopen from Friday, and the night curfew and quarantine periods will be shortened.

Also, pilot reopening areas will be expanded, but the state of emergency will remain in force.

The government's Centre for Covid-19 Situation Administration (CCSA) approved the changes at its meeting on Monday.

The relaxed measures apply to the 29 provinces declared dark-red zones of maximum and strict disease control, and would take effect this coming Friday.

The night curfew in dark-red zoned areas is shortened by one hour, from 10pm to 4am.

The curfew will continue for at least another 15 days and shopping centres and convenience stores will close at 9pm.

The CCSA approved the reopening of beauty salons, beauty clinics, massage and spa parlours and movie theatres and permitted live music at restaurants.

Also to reopen are nurseries, libraries, museums, learning centres and manicure and tattoo shops.

Quarantine periods will be shortened from 14 days to seven days for fully vaccinated foreign tourists. For visitors who have not been fully vaccinated, the quarantine will be 10 days for arrivals by air and water and 14 days for arrivals by land.