After he had 0541 to start manufacturing the weapons, Jiang Fei continued to find parts of Braveheart.
Even though it was still Summer in the North Pole, there was barely any heat in the air. The snow was still forming even in the sunlight. Without proper guidance, one could easily lose his direction and get lost. A compass would do not much help here.
Jiang Fei had 0541 to guide him around, making sure that Jiang Fei does not make a round trip to where he had already passed. 0541 basically digitized and cataloged the entire North Pole and ensured that Jiang Fei covered the entire continent.
"Ariel, do you fancy a rest?" said Jiang Fei after flying constantly for three hours.