Returning to Los Angeles was actually quite convenient. The Garden didn't have a safe house in Los Angeles, but Gao Yi had rented a house there.
Before departing, he used the safe house's 3D printer to make a few dozen sets of fingerprint stickers. The passport Gao Yi used had fake fingerprints; he would always need to use fake fingerprints to enter and exit the United States, as it would have been inconvenient to seek such fingerprints without a 3D printer once in the US.
Buying the plane tickets did cause him some discomfort, though.
He had grown accustomed to luxury, flying in private jets or at least first class when with Sean, but Luca insisted on flying economy class.
Even though Gao Yi was paying, not Luca, Luca firmly believed that flying first class was an extravagant and meaningless act, and such waste of money was to invite divine punishment.
Fortunately, Gao Yi had not had money for long, so he followed Luca's advice and flew economy class back to Los Angeles.