What was a commercial means used by foreign businessmen to promote sales in the early Republic of China?

Newspapers.

During the Republic of China, newspapers were the best "mass media". As soon as the newspaper boy shouted, the news spread, big and small.

The meaning of commercial means refers to the meaning of means in the commercial field. Usually, some advertising means can be defined as commercial means, because advertising means can achieve commercial purposes.

NCTDREAM role introduction

How to write the output function of java language?

Idioms beginning with the word "Shu"

When using ftp7.5 on server2008, which ports should I open in the firewall?

My surname is Duan, which rhymes with the next sentence.

Hello, Cai Wenjing, Franz Chen. What issue is Saturday?

The Soviet Union wiped out more than 100 divisions in Germany, so how much is a division?

What eggs are hidden in the ending of Attack Giant? What is the reputation of this play?

How is the quality of Yuchai excavator?

Transitional sentences in the composition of the opening ceremony of the sports meeting