The Xuantian Continent was really small compared to Boundless Mainland.  It was about half the size of the Fei Li Empire and was much smaller than the Zhongtian Empire. Therefore, it had to rely much more on the sea for resources than the Boundless Mainland did, so when it came to oceangoing vessels they were a far cry from Boundless Mainland.

As for Heavenly Jewel Masters?  Xuantian Continent had many sects, but they were different from Boundless Mainland’s Great Saint Lands. Xuantian Palace stood alone on Xuantian Continent, and was the cornerstone for the Xuantian Empire’s unification of the continent 1,300 years ago. There were no other nations on this continent, while the smaller Heavenly Jewel Master sects existed under Xuantian Palace’s graces.

So it was very simple on Xuantian Continent. The Xuantian Empire and Xuantian Palace took center stage, and there wasn’t too much quarreling. Xuantian Palace flourished for a time, but with no competition or foreign enemies the Xuantian Empire had also become complacent.

Of course, Zhou Weiqing wasn’t really interested in any of that. The most useful information he obtained was about how to join Xuantian...