October TISI hits five-month highPassengers arriving at Suvarnabhumi airport have their documents checked under the Thailand Pass scheme. The reopening of the country to fully vaccinated tourists was one of the reasons cited for the improvement in October's TISI. The reopening of the tourism industry to welcome back fully vaccinated tourists without quarantine also drove the TISI. "But the government should not only hope for the return of Chinese visitors because it remains unclear when the Chinese government will ease rules to allow its people to travel abroad," said Mr Supant. "We're worried the Ft will increase because of the global oil price surge," said Mr Supant.