Smoke billows from a tear gas shell fired by police during a tractor rally by farmers to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Nihangs (Sikh warriors) ride their horses as they take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Mothers and their children wearing masks for protection against the coronavirus disease (COVID-19) wait for free vitamins and medicine at a local health center in Manila, Philippines, January 26, 2021. REUTERS/Eloisa Lopez

A mother and her children wait for a general check-up behind a makeshift plastic barrier for protection against the coronavirus disease (COVID-19) at a local health center in Manila, Philippines, January 26, 2021. REUTERS/Eloisa Lopez

Mothers and their children wearing masks for protection against the coronavirus disease (COVID-19) wait for free vitamins and medicine at a local health center in Manila, Philippines, January 26, 2021. REUTERS/Eloisa Lopez

People wearing masks for protection against the coronavirus disease (COVID-19) line up for a general check-up at a local health center in Manila, Philippines, January 26, 2021. REUTERS/Eloisa Lopez

Farmers try to remove a barricade during a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Farmers use sticks to push away tear smoke shells fired by police during a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

A F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) is seen at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

A F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) is seen at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Mechanics repair F-CK-1 Ching-kuo Indigenous Defence Fighters (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Members of the air force prepare Wan Chien air-to-ground cruise missiles at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Mechanics repair F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Mechanics repair F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

A mechanics repairs F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

A pilot prepares to take off on a F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Two pilots discuss flight plans before a mission at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Mechanics repair F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

A F-CK-1 Ching-kuo Indigenous Defence Fighter (IDF) is pictured at an Air Force base in Tainan, Taiwan, January 26, 2021. REUTERS/Ann Wang

Workers on a forklift set up street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

Workers wearing face masks assemble street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

People sit in a bus as lantern decorations are reflected on a window ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

A man wearing a face mask walks past a worker assembling street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

A woman walks at a hutong alley decorated with lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

People wearing face masks are seen on a street decorated with street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

A person rides a bike on a street decorated with lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

Farmers take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Farmers take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Farmers take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Workers on a forklift set up street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

A farmer holding a sword looks on after police stopped farmers as they take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Farmers are seen after police stopped them as they take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

A worker wearing a face mask assembles street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

Farmers take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Farmers are showered with flower petals as they take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day in Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

A worker wearing a face mask carries street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

Workers wearing face masks assemble street lights in the shape of Chinese lanterns ahead of the Chinese Lunar New Year holiday, amidst the outbreak of the coronavirus disease (COVID-19), in Beijing, China January 26, 2021. REUTERS/Tingshu Wang

People line up for nucleic acid testing at a makeshift testing site in a park following the coronavirus disease (COVID-19) outbreak, on a polluted day in Daxing district of Beijing, China January 26, 2021. REUTERS/Stringer

People line up for nucleic acid testing at a makeshift testing site in a park following the coronavirus disease (COVID-19) outbreak, on a polluted day in Daxing district of Beijing, China January 26, 2021. REUTERS/Stringer

A medical worker wearing personal protective equipment (PPE) collects a swab sample from a woman to be tested for the coronavirus disease (COVID-19) as the outbreak continues, at the Patriot Chandrabhaga stadium in Bekasi, Indonesia, January 26, 2021. REUTERS/Ajeng Dinar Ulfiana

Band members from the Nepal Army wave towards the Nepali climbers who were the first to scale K2, the world's second tallest peak, in winter, upon their arrival from the mountain, at Tribhuvan International Airport in Kathmandu, Nepal January 26, 2021. REUTERS/Navesh Chitrakar

Nepali climbers who were the first to scale K2, the world's second tallest peak, in winter, cheer upon their arrival from the mountain, at Tribhuvan International Airport in Kathmandu, Nepal January 26, 2021. REUTERS/Navesh Chitrakar

A man takes a selfie with the Nepali climbers who were the first to scale K2, the world's second tallest peak, in winter, upon their arrival from the mountain, at Tribhuvan International Airport in Kathmandu, Nepal January 26, 2021. REUTERS/Navesh Chitrakar

Tractors are seen before the start of a tractor rally to protest against farm laws on the occasion of India's Republic Day at Tikri border near New Delhi, India, January 26, 2021. REUTERS/Anushree Fadnavis

Nepali climbers who were the first to scale K2, the world's second tallest peak, in winter, cheer upon their arrival from the mountain, at Tribhuvan International Airport in Kathmandu, Nepal January 26, 2021. REUTERS/Navesh Chitrakar

Farmers arrive to take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day at Tikri border near New Delhi, India, January 26, 2021. REUTERS/Anushree Fadnavis

Chart of calendar days on which Chinese flights made incursions into Taiwanese air space.

Residents of an area are seen behind a police barricade as they see farmers taking part in a tractor rally to protest against farm laws on the occasion of India's Republic Day at Tikri border near New Delhi, India, January 26, 2021. REUTERS/Anushree Fadnavis

Farmers take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day at Tikri border near New Delhi, India, January 26, 2021. REUTERS/Anushree Fadnavis

Farmers run after breaching a police barricade as they take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day at Tikri border near New Delhi, India, January 26, 2021. REUTERS/Anushree Fadnavis

Vietnam's Prime Minister Nguyen Xuan Phuc (C) arrives for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Hong Kong Chief Executive Carrie Lam attends a weekly news briefing in Hong Kong, China January 26, 2021. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam attends a weekly news briefing in Hong Kong, China January 26, 2021. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam attends a weekly news briefing in Hong Kong, China January 26, 2021. REUTERS/Tyrone Siu

Hong Kong Chief Executive Carrie Lam attends a weekly news briefing in Hong Kong, China January 26, 2021. REUTERS/Tyrone Siu

Farmers gather to take part in a tractor rally to protest against farm laws on the occasion of India's Republic Day at Singhu border near Delhi, India, January 26, 2021. REUTERS/Danish Siddiqui

Motorcades stop near the communist sign before the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Motorcade escort delegates arriving for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

A female police officer walks past a communist sign at the National Convention Center, the venue of the 13th national congress of the ruling communist party of Vietnam in Hanoi, Vietnam January 26, 2021. REUTERS/Kham