In the direction of Chu State, small countries that were formerly vassals of Chu State have actively requested vaccines from China.

Now, even the East China Sea Dragon Palace has joined in.

Naturally, their intentions could not be hidden from Xu Ji.

All of them actually wanted to use the antidote to pox to strive internally and externally to become vassal 'princes' of China.

"Princes?"

"It is indeed the tradition of this mythical world!"

In this mythical world, in the past millions of years of history, all dynasties have only ruled the royal territory, which is the core land covered by the sacred tree.

In addition to the sacred tree, there are all enfeoffments, which are authorized to the princes to shepherd and guard them.

In Xu Ji's eyes, the feudal system was undoubtedly backward and decadent.

However, this mythical world is really too big!

Just Nanzhanbuzhou, where the Kingdom of China is located, is a vast continent that is nearly a hundred thousand miles from east to west and tens of thousands of miles wide from north to south!

And there are three continents as big as this!

The distance between the four major states is extremely far.

From Nanzhanbuzhou to Xiniuhezhou, the land route is one hundred and eight thousand miles!

Even the nearest Dongsheng Shenzhou, facing each other across the East China Sea, is more than 80,000 miles away in a straight line!

Judging from the current technological level of China, it is almost impossible to directly rule such a vast area.

Including willow trees, I don’t know what the limit is that can be covered.

Therefore, Xu Ji also hesitated.

"Calculate the time, the conversion will be quick!"

"When we return to Blue Star, let's ask Professor Chen Ke about this matter..."

"In addition, I will have more resources, manpower and material resources at my disposal on Blue Star!"
Chapter completed!