India's tally in the premier tournament is 32 medals, including 12 gold, eight silver and 12 bronze.
The 19-year-old fired in from the edge of the box in the 66th minute to break stiff Chinese resistance in the Group B encounter.
Viswanthan Anand was beaten by World champion Magnus Carlsen and Shakhriyar Mamedyarov in the first two rounds of the Altibox Norway Chess tournament.
Nadal was the favourite and top seed having lifted the Barcelona Open trophy last month but played below par on a sweltering spring day.
Olympic champions Elaine Thompson-Herah, Selemon Barega, Armand Duplantis, Steven Gardiner, Emmanuel Korir, Hansle Parchment and Karsten Warholm were all beaten.
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