The main chinese port was called
beijing
guangzhou
yangtze
chang'an

The answer is Guangzhou.  It is Guangdong’s capital and is considered as China’s maritime version of the Silk Road.  It is vital to the country as a national transportation hub and trading port. It is also known for the Canton fair where large quantities of products and buyers take part.

answer; i believe the two groups were irish immigrants and chinese immigrants;

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.