Is the English name on the passport issued by Guangdong in Cantonese Pinyin or Chinese Pinyin?

It's hanyu pinyin, because Guangdong is also under the central control. It's not Cantonese Pinyin, it's Webster Pinyin. People who spell names with Webster's Pinyin usually spell names in their own dialects. This is very common among overseas Chinese.

For example, "Huang" surname:

Chinese pinyin is yellow.

People who speak Cantonese (known overseas as Guangfu people) will use WONG, because Cantonese is indeed pronounced WONG, so you will find that all people surnamed Huang in Hong Kong and Macao are called WONG, because Cantonese is their official language.

People who speak Chaozhou dialect, that is, Chaoshan people (called chaozhou people overseas) will use NG, because Chaozhou dialect is pronounced NG.

Another example is "Chen"

Chinese pinyin is Chen.

Cantonese is changing.

Chaozhou dialect is Tan.

Therefore, in overseas immigrant communities or Chinese-speaking Singapore, just look at the spelling of his surname and you will know where his ancestral home is.

A man named Chen. If you spell CHAN, it must be the descendants of Guangfu immigrants or Hong Kong and Macao immigrants; If it is Tan, it must be a descendant of immigrants from chaozhou people, or it may be a descendant who speaks Minnan dialect. If it's Chen, it must be a new immigrant, because people in northern dialects didn't have the tradition of emigrating overseas in the past, so they don't have to consider it. At present, there are immigrants all over China, but everyone, regardless of the north and south, has become Chen, and their nationality has been applied under their old passports. Since China's passport is called Chen, even if you become an American passport or a Canadian passport, you will not deliberately change it to Chen or Tan. So they must have gone out after 78 years, so these people are all new immigrants.