Ca Tru has many names, depending on each locality, each period of time, it is also called A dao singing, Cua dinh singing, Cua quyen singing, Co dau singing, Nha to singing, Nha tro singing and Ca cong singing. This is a long-standing and unique form of art which has special meaning in the musical treasures of Viet Nam, associated with the traditional festivals, customs, religions, literature, music, thoughts and philosophy of the Vietnamese.

The space of gong culture in Central Highlands of Viet Nam covers 5 provinces of Kon Tum, Gia Lai, Dak Lak, Dak Nong and Lam Dong. The masters of gong culture are the ethnic groups of Ba Na, Xo Dang, M’Nong, Co Ho, Ro Mam, E De, Gia Rai… The gong performances are always closely tied to community cultural rituals and ceremonies of the ethnic groups in Central Highlands. Many researchers have classified gongs as ceremonial musical instrument and the gong sounds as a means to communicate with deities and gods.

In its ordinary meaning, Court Music is understood as music genres, including music for dance and opera, used in worshiping ceremonies, national court – organized festivities, and occasions of entertainment for Kings and Royal families. But the term Nha Nhac (imported from China) was used by Vietnamese feudal dynasties from the Ho Dynasty with different meanings, for example sometimes indicating general court music, sometimes court ritual music in particular, sometimes indicating music department, even a concrete orchestra.

Ba Na Nui Chua Nature Reserve – Da Nang

Ba Na Nui Chua Nature Reserve is situated on Mount Ba Na, a 1,487 metre-high mountain on the border between Da Nang city and Quang Nam province. Mount Ba Na is situated to the south-east of the mountain ridge that stretches across central Vietnam, from the Annamite mountains to the Hai Van pass. However, Mount Ban Na and the montane habitats it supports are isolated from this ridge by intervening areas of lower elevation.Streams and rivers originating in the north-west of the nature reserve feed the Ca De river, which flows into the north of Da Nang bay, while those originating in the south and east of the nature reserve feed the Yen river, which flows into the south of the bay.

Pu Luong Nature Reserve – Thanh Hoa

Pu Luong nature reserve is located in Quan Hoa and Ba Thuoc districts, in north-western Thanh Hoa province. To the north-east, the nature reserve is bordered by Mai Chau, Tan Lac and Lac Son districts, Hoa Binh province. The Pu Luong nature reserve lies along two parallel mountain ridges, that run from north-west to south-east, and are bisected by a central valley. This valley contains several human settlements and a large area of agricultural land, and, hence, is not included within the proposed nature reserve.

Can Gio Biosphere Reserve – Ho Chi Minh City

Can Gio Biosphere Reserve, also called Can Gio forest park is located in Can Gio district (previously Duyen Hai district), in the coastal zone of Ho Chi Minh City. The area is situated in a recently formed estuary complex of tidal flats, where the Vam Co, Saigon and Dong Nai rivers discharge into the sea. The topography of Can Gio is low-lying and dynamic. The site is divided by a network of canals and rivers.

Cu Lao Cham Nature Reserve – Quang Nam

Cu Lao Cham Nature Reserve is situated in Tan Hiep commune, Hoi An town. The nature reserve comprises an archipelago of one large island and seven smaller islands, lying about 12 km off the coast of central Vietnam. The largest island, Hon Lao, covers 1,317 ha. The topography of Cu Lao Cham island is dominated by two peaks: a 517 m peak in the centre of the island and a 326 m peak at the western end.

Xuan Nha Nature Reserve – Son La

Nha Nature Reserve lies in Moc Chau district in the south-west of Son La province. To the south and east the nature reserve is bordered by Hoa Binh and Thanh Hoa provinces, while, to the west, it is bordered by Laos. The highest point in the nature reserve, Mount Pha Luong at 1,970 m, lies on the mountain ridge that forms the international border with Laos. The topography of the nature reserve is composed of two wide, shallow-sided valleys, which run eastward across the nature reserve from the Laotian border. The northern valley is formed by the Nha stream, while the southern valley is formed by the Nam Can stream. These two streams meet in the extreme south-east of the nature reserve, from where they flow south to join the Ma river.