China has extended visa-free access to Hainan for another 33 — mostly European and South American — countries, as President Xi Jinping seeks to boost the tropical province’s popularity among foreign tourists.

New regulations expanding the travel privileges to 59 nations come into effect in May, the official Xinhua News Agency said, citing the State Immigration Administration. Tourists from those countries can enter the province as individuals without a visa and stay for as many as 30 days — a shift from previous rules that required people to travel in groups and stay no longer than 21 days.

Countries added to the list of those with visa-free access include Belgium, Brazil, Greece, Poland and Qatar.

The change would help “further expand the opening up of the tourism industry and attract more international tourists to travel to Hainan,” Xinhua said, adding that the move would promote the aviation industry, tourism and economic development.

The announcement comes as the province — often billed as “China’s Hawaii” — is trying to manage a budget gap and the debt woes of HNA Group Co., its biggest conglomerate, which is facing pressure from creditors after a global acquisition spree.

Foreigners traveling in the rest of mainland China will generally need to arrange visas before arriving in the country. Hainan, which roughly the size of Switzerland, received a package of economic policies paving the way for horse racing, sport lotteries, and expanded duty-free shopping after Xi visited the area earlier this month.

Bloomberg reported in February that government agencies under a party reform group headed by Xi were considering proposals to support the island, including allowing online gaming and a lottery, relaxing visa rules and enhancing infrastructure.

Countries with visa-free access to Hainan now include:

Argentina, Australia, Austria, Belarus, Belgium, Bosnia and Herzegovina, Brazil, Brunei, Bulgaria, Canada, Chile, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Indonesia, Ireland, Italy, Japan, Kazakhstan, Latvia, Lithuania, Luxembourg, Macedonia, Malaysia, Malta, Mexico, Monaco, Montenegro, Netherlands, New Zealand, Norway, Puhilippines, Poand, Portugal, Qatar, Romania, Russia, Serbia, Singapore, Slovakia, Slovenia, South Korea, Spain, Sweden, Switzerland, Thailand, United Arab Emirates, Ukraine, United Kingdom and United States.