I am traveling from Qingdao, China to Mumbai, India on Air China for business. My ticket itinerary has 1 piece of luggage confirmed. However, I bought some additional items that I have to take back with me (clothes and gift merchandise).
Now, I have an extra bag weighing 50 lbs (23 kg). I contacted my travel agency and they said that the cost of an extra bag is approximately 650 - 800 RMB. I searched various websites but have not found information to confirm this.
How can I positively confirm the price? And can I pay for an additional bag in advance to avoid any last-minute formalities?