SEOUL, SOUTH KOREA (AP) - North Korea stands to lose a rare legitimate source of foreign currency, worth hundreds of millions of dollars a year, if nations that employ its people as guest workers abide by a UN order to send them all home by this weekend.
Sanctions imposed by the UN Security Council in December 2017 after North Korea tested a long-range missile required member states to repatriate all North Korean workers from their territories within 24 months, a deadline that arrives on Sunday (Dec 22).
There are no UN penalties for not following through, however, and it appears unlikely that there will be a mass exodus of the thousands of workers still believed employed in places like China and Russia.
But if even half of North Korean workers were sent back home, North Korea would still suffer financially, said analyst Oh Gyeong-seob at Seoul's Korea Institute for National Unification.
In China, Russia and elsewhere, there is strong demand for cheap North Korean workers.
The US State Department previously estimated there were about 100,000 North Korean workers worldwide, and civilian experts said those workers brought North Korea an estimated US$200 million (S$271 million) to US$500 million in revenue a year.
North Korean workers abroad are under the constant surveillance of their country's security agents, toil more than 12 hours a day and take home only a fraction of their salaries, with the rest going to their government.
Human rights organisations have called them modern-day slaves, but their jobs are highly coveted in North Korea.
According to interim reports that member states submitted to the UN, 23,245 North Korean workers have so far been repatriated.
But those figures don't include China, which hasn't publicised its own report, or a dozen other countries that have yet to submit their reports and are believed to have employed North Koreans.
The estimate for the number of North Koreans working in China has been as high as 50,000 to 80,000, with the vast majority working in factories in the country's north-east along the long border with North Korea. China hosts the most North Korean workers.
Mr Lim Soo-ho, a sanctions expert at Seoul's Institute for National Security Strategy, said Beijing would find it difficult to persuade local governments in the region to send those workers home as their small special economic zones mainly rely on North Korean labour.
Mr Lim said he has seen no signs that the number of North Korean workers in north-eastern China was decreasing.
Mr Kim Donggil, a Korea expert at Beijing's Peking University, said China would be lax in enforcing repatriation.
However, Chinese Foreign Ministry spokesman Geng Shuang told reporters at a daily briefing on Friday: "As long as the resolution is still in effect, China will earnestly fulfil its international obligation and handle relevant issues in accordance with the stipulation in the resolution."
Staff at North Korean restaurants in Beijing shut their doors and hung up phones when asked about whether they would be sending North Korean employees back home.
The interim UN reports show that about 80 per cent of the North Koreans repatriated worldwide were from Russia, where most were employed in the construction, forestry and logging industries.
A Russian interim report said the number of North Koreans with valid work permits in the country decreased to 11,490 in late 2018 from 30,023 a year earlier.
Public records show the Labour Ministry hasn't issued a single work authorisation for North Korean workers this year.
There are signs that more North Korean workers are preparing to return home.
North Korea's national airliner, Air Koryo, temporarily increased the number of flights from Vladivostok to Pyongyang in the second half of December, while train tickets this month from the Russian city of Ussuriysk to Pyongyang have already sold out, according to Russian data.
One company, the Yenisei construction company based in Krasnoyarsk in eastern Siberia, said they no longer employ any North Korean workers and are in fact going out of business.
"North Korean workers were good for us from many aspects - soft power, economics, political influence," Russia's Ambassador to North Korea, Mr Alexander Matsegora, said in a recent interview with the Vladivostok radio.
"Now we are going to lose all that."
The United Arab Emirates repatriated 823 North Korean workers, more than half of the North Koreans who were earning income in the country, as of December 2017, according to an interim report by the country in March.
Qatar told the UN in March that there were only 70 North Koreans working in the country, down from about 2,500 in January 2016.
Most of the North Koreans had been working in construction, though Qatar has said none of them had ever worked on construction sites related to the 2022 World Cup.
Kuwait, which once had thousands of North Korean labourers, said it has sent back more than half of them.
Vietnam said in June that it repatriated 51 North Korean workers.
Singapore said in March that it revoked the work permits of all North Korean nationals and had not granted new ones.
Experts say North Korea has also sent workers to at least 13 African nations, including Uganda, Angola, Ethiopia, Senegal, South Africa and Equatorial Guinea.
Only Equatorial Guinea has filed an interim UN report, though it didn't say how many North Koreans had been repatriated.