Changed the worn brake cable with the new one. 

Purchased from Amazon,

Specifications:

• Brand new steel Brake inner cables
• Material: steel wire
• Name: Bike Brake Cable
  length: approx 2m / 6.56ft(Front); 2m/6.56 ft(Rear), can cut the cable shorter if it is too long
• Color: Silver
• High tensile, high strength, wear-resistant and durable
• It can help adjust smooth operation tension and corrosion resistance, which will provide a better & safer riding experience