People of shumar Gewog under Pemagatshel District practice the culture called Lhasay (supplication). People called it as Gazang Lha where they do supplication once in every year and pray to Gazang Lha. Gazanglha is considered as very important diety of their village and they pray to Gazanglha for their good livelihood. They celebrate the supplication ceremony only on good day and time and they make edible items like offering ginger, salt, rice, and fish as to Gazanglha to protect them from all sorts of harming in the world (lha, lu tshen and ghost). They pray for the clean environment to live and to clean out all the in and out obstacle of the calamity.