The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]

The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]

The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]

The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]

The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]

The Argun river running along the China and Russian border in northeastern China's Heilongjiang
province has nurtured numerous wetlands in the region. Rich in wild animal and plant life, the
wetlands serve as a conditioner of the local natural ecosystem. [Photo: travel.sohu.com]