If you choose an overseas publishing house (including Hong Kong, Macao and Taiwan) to publish.

It can only be sold in Chinese mainland after it has been introduced through the national copyright exchange.

And this possibility is very small.

If your friend wants to plan the publication of economic management books.

It is best to find a domestic publishing house.

Then adopt the mode of cooperative publishing.

ISBN and distribution channels are provided by publishing houses.

You provide the manuscript.

And share the profits.