Hot-air balloons fly in the sky over Cappadocia, Turkey, on Feb. 20, 2021. Choked off by the coronavirus pandemic and travel restrictions that it triggered, Turkey's tourism revenues, crucial for the nation's economy, fell by 65 percent in 2020, Turkish Tourism and Culture Ministry's data showed.(Photo: Xinhua)

People wearing face masks ride a hot-air balloon in Cappadocia, Turkey, on Feb. 20, 2021. Choked off by the coronavirus pandemic and travel restrictions that it triggered, Turkey's tourism revenues, crucial for the nation's economy, fell by 65 percent in 2020, Turkish Tourism and Culture Ministry's data showed.(Photo: Xinhua)

Hot-air balloons fly in the sky over Cappadocia, Turkey, on Feb. 20, 2021. Choked off by the coronavirus pandemic and travel restrictions that it triggered, Turkey's tourism revenues, crucial for the nation's economy, fell by 65 percent in 2020, Turkish Tourism and Culture Ministry's data showed. (Photo: Xinhua)

A hot-air balloon flies in the sky over Cappadocia, Turkey, on Feb. 20, 2021. Choked off by the coronavirus pandemic and travel restrictions that it triggered, Turkey's tourism revenues, crucial for the nation's economy, fell by 65 percent in 2020, Turkish Tourism and Culture Ministry's data showed.(Photo: Xinhua)