By Toann Vu | dtinews.vn 
 
 
 Six newly-installed machines of this kind have attracted lots of local  people who used them for doing their exercise and contributing to clean  the lake water.  
 

 
 The machine is similar to a bicycle but it is linked to a power  generator and a water filtration system.  So when people use the  machine, the generator will run and produce power. 
 

 
 The power transmitted into a battery helps the water filtration operate  to pump water from the lake into a filter tank. After being filtered,  water is pumped back into the lake. 
 

 
 This model has been implemented at Nhieu Loc Canal in HCM City and this is the first time it has been carried out in Hanoi. 
 

 
 Water pipes connected to the water filtration system 
 
 
  
 

 
 The filter tank is filled with materials which help to absorb pollutants 
 

 
 Both adults and children can use the machine 
 

 
 Saddle height can be adjusted 
 

 
 This model will be widely applied in Hanoi