Garewal and Dwivedi, who have been honing their skills on the developmental Tour, are now lying Tied-27th, but seven shots behind the leader, Lin Wen-ko who took advantage of his home course knowledge. Lin fired a stunning seven-under-par 65 to lead in the opening round.
Lin, the younger brother to Wen-tang and a former Taiwan Masters champion, returned with a bogey-free round highlighted by seven birdies to open-up a three-shot lead over Hsu Hao-sheng at the Hsin Feng Golf and Country Club.
Defending champion Chan Shih-chang fired a 70 while Wen-tang, fighting for an Olympic berth posted a disappointing 74.
The staging of the Ambassador ADT, which is sponsored by the Yeangder Group, will provide an opportunity for the local golfers to stake a claim at the Olympics in Rio de Janeiro in August as the winner will receive six Official World Golf Ranking points.
The ADT, which was inaugurated in 2010 as the gateway to the premier Asian Tour, will continue to reward the top-five finishers on the Order of Merit at the end of this season with Asian Tour cards for 2017.