The surprisingly mature schoolboy carded a three-under-par 69 in Friday's second round of the US Tour event to finish at three-under 141, right on the cutline.
Having already become the youngest player to make the cut in a Major championship, Guan ensured he would play two more rounds at the TPC Louisiana over the weekend after mixing five birdies with two bogeys and totalling just 25 putts.
"I think I played a very good round today," Guan told the Golf Channel after safely parring his final hole, the short ninth, where he hit a hybrid from 187 yards over water to 25 feet behind the hole.
"I made a lot of birdies and got a couple of good up-and-downs, so it was still a pretty good round."
Asked how this week had matched up to his Masters experience two weeks ago, Guan replied: "It has been a little different, I would just like to prepare for another tournament. Not much different, just doing normal (things) that I should do."
Guan, who booked his place at the Masters by winning last year's Asia-Pacific Amateur champion, was watched by large galleries on Friday as he improved on his opening round of level-par 72.
Though conditions were relatively calm at the rain-softened TPC Louisiana, the players were not permitted to lift, clean and replace golf balls on the fairway, as they were during Thursday's first round.
"It was a little better today but still wet," Guan said of the state of the par-72 layout. "Sometimes I got some dirt on the ball. But today they moved the tee up on a couple of holes so it was not too bad."
Guan's 69, which included three birdies on his back nine, was his first sub-par score on the US Tour in six attempts.
Asked if he had amazed himself by how well he had played, the teenager replied: "I am not too surprised because I came here last year and I have some friends here. I think I did a pretty good job today."
Guan, who spent one month in New Orleans last year with his family staying with friends, had been clear-cut about his goals for this week before the tournament began.
"I want to enjoy the week like in the Masters and, hopefully, make the cut," he told reporters on Tuesday. "If not, it's still a great experience. I hope to play good scores out there."
With that mission now accomplished, he was asked to outline his objectives for the weekend.
"Play my best golf to go further," Guan said with the hint of a smile.
When early starter Guan ended his second round at the TPC Louisiana, he was tied for 42nd in the field of 154 players.
Once the round was over, he was joint 57th and among 71 who advanced to the weekend.
Perhaps even more impressively, he has not yet recorded a score worse than a bogey in his six rounds so far completed on the US Tour.
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