At the southeast edge of the Qinghai - Xizang Plateau, the warm and moist airflow from the Indian Ocean encounters the chilly wind from the Qinghai – Xizang Plateau, resulting in a unique ecosystem - the Yarlung Zangbo - Nyang Wetland. Each inch of land here is imbued with precious life. Due to the extremely fragile ecosystem of high - altitude wetlands, it's hardly possible to restore them once destroyed. However, a team of conservation rangers sets off at dawn, patrolling throughout the year to monitor the changes of seasons.