There is an even simpler method: contact the members of Suzaku. The Suzaku branch under the Grand Alliance is not only in charge of intelligence in the Ancient Realm, but also handles scientific research. They should be able to help.
As for finding a Saint to construct a passageway, the only person he could think of was Senior Gu Qingyang.
However, he had gone deep into the Ancient Realm, and there was no telling when he would return.
Chapter 396