Combretum indicum, as the Chinese honeysuckle or Rangoon creeper, is a vine

Combretum indicum, also known as the Chinese honeysuckle or Rangoon creeper, is a vine with red flower clusters and is found in Asia. It is found in many other parts of the world either as a cultivated ornamental or run wild. 

Hindi name is Madhu Malti or Madhumalti मधुमालती. (More pictures in comments)

The flowers emit mild fragrance. In bunches they are attractive. The flowers are said to strategically change colour.

"The flower is initially white and opens at dusk. This attracts hawkmoths with long tongues for pollination. On the second day it turns pink and on the third it turns red attracting day flying bees and birds."

"The plant is used as an herbal medicine. Decoctions of the root, seed or fruit can be used as antihelminthic to expel parasitic worms or for alleviating diarrhea. Fruit decoction can also be used for gargling. The fruits are also used to combat nephritis. Leaves can be used to relieve pain caused by fever. The roots are used to treat rheumatism."

Pawan kumar Gupta