The Chinese outfit that has been invited to add glamour to the tournament was given a tough challenge by the Mohammadan Sporting, who played an attacking brand of football right from the outset.
Both the sides played out a goalless first-half and when it seemed the match was heading towards a draw, Christopher fired in the 85th minute to earn full points for the team.
Group A consists of China's Shandon Lueng FC, defending champions Churchill Brothers, Southern Samity, Mohammedan Sporting and East Bengal.
Mohammadan Sporting and Southern Samity clubs now have three points each while East Bengal and the Chinese outfit are yet to open their account.
Group B consists of Aryan, Shillong Lajong, Chirag United and 22-time winners and last year's runners-up Mohun Bagan and Pune FC.
Mohammadan Sporting beat Shandon Lueng FC 1-0
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