Tourists take photos in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Tourists take photos in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Aerial photo taken on Nov. 2, 2020 shows colorful flowers in a farm in Chiang Mai, Thailand. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Aerial photo take on Nov. 2, 2020 shows tourists taking photos in a flower farm in Chiang Mai, Thailand. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

A tourist is seen in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Aerial photo take on Nov. 2, 2020 shows tourists taking photos in a flower farm in Chiang Mai, Thailand. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Aerial photo taken on Nov. 2, 2020 shows colorful flowers in a farm in Chiang Mai, Thailand. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

A tourist draws in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Tourists take photos in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)

Tourists take photos in a flower farm in Chiang Mai, Thailand, Nov. 2, 2020. Flowers in Chiang Mai have entered blooming season recently. (Xinhua/Zhang Keren)