Why in News? 

• Bangladesh plans to involve China in the River Teesta restoration project. 
• The decision comes amidst long-standing delays in the Teesta water-sharing treaty between India and Bangladesh. 

About Teesta River 

• Origin: Begins as Chhombo Chhu from the Khangchung Chho glacial lake in Sikkim. 
  • The lake is located at the snout of the Teesta Khangse glacier, descending from Pauhunri Peak. 
• Flow Path: Flows through Sikkim and West Bengal, and then enters Bangladesh, where it merges with the Jamuna River (a distributary of the Brahmaputra). 

Major Tributaries 

• Left-bank tributaries: Lachung Chhu, Rangpo Chhu, Chakung Chhu, etc. 
• Right-bank tributary: Rangeet River (the largest tributary). 

 Teesta Water-sharing Treaty (2011 Draft): 

• Proposed sharing formula during dry season: 
  • India: 42.5% 
  • Bangladesh: 37.5% 
• Status: Implementation halted due to objections from West Bengal, citing concerns over water availability for the state.