Seoul: Air China restarted direct flights between Beijing and Pyongyang on Monday for the first time since the pandemic, although for now North Korea is only allowing in travellers with official or other special purposes.AFP looks at tourism in one of the world's most isolated countries, alongside the shifting relations between Pyongyang and its main economic and diplomatic backers, China and Russia.Also Read: North Korea conducts engine test for missile capable of targeting US mainlandDo any tourists go to North Korea ? Before both countries closed their borders due to Covid-19, there were an estimated 300,000 foreign visitors in 2019...