In a Facebook post on Sunday, he said people who decide to return to their hometown to pay a visit to relatives posed a risk in spreading the virus.
He added that 10 per cent of people taking Covid-19 tests in hospital were positive, a higher percentage than last year.
"Therefore, everyone should maintain distance, wash their hands and wear face mask," he said. "Nowadays, we can meet relatives even via online channels, such as Line Call and FaceTime."
He also asked people to refrain from splashing water on others and forming alcohol drinking circles.