"Guo", written in Chinese: 郭, is one of the most common Chinese surnames and means "the wall that surrounds outside a city" in Chinese; it can also be spelled Cok, Guo, Quo, Quoc, Quach, Quock, Que, Quek, Kuo, Kok, Koc, Kwok, Kuok, Gock or Koay. The different way of spelling of this surname indicates the origin of the family. For example, "Kwok" is Cantonese originated in Hong Kong and surrounding area. It is the 18th most common family name in China. The name Guo was noted as far back as the Xia Dynasty.

The Guo family is one of the well known Hui clans around Quanzhou in Fujian, the other being the Ding family, they are examples of these Hui who identify as Muslim by nationality but do not practice Islam. Due to more people of these clans identifying as Hui the population of Hui as grown. All these clans needed were only evidence of ancestry from Arab, or Persian, or other Muslim ancestors to be recognized as Hui, and they do not need to practice Islam. It was the Communist party and its policies which encouraged the definition of Hui as a nationality or ethnicity. The Chinese Government's Historic Artifacts Bureau preserved tombs of Arabs and Persians whom Hui are descended from around Quanzhou. Many of these Hui worship village gods and do not have Islam as their religion, some are Buddhists, Daoists, followers of Chinese Folk Religions, secularists, and Christians. Many clans with thousands of members in numerous villages across Fujian recorded their genealogies and had Muslim ancestry. These Hui clans originating in Fujian have strong sense of unity among their members, despite being scattered across a wide area in Asia, such as Fujian, Taiwan, Singapore, Indonesia, and Philippines.

Aaron Kwok Fu-shing (born 26 October 1965) is a Hong Kong singer, dancer and actor. He has been active since the 1980s to the present. The media refer to him, Jacky Cheung, Andy Lau and Leon Lai as the Cantopop Four Heavenly Kings (四大天王). Kwok's onstage dancing and displays is influenced by Michael Jackson. While most of his songs are in the dance-pop genre, he has experimented numerous times with rock and roll, ballad, rock, R&B, soul, electronica and traditional Chinese music.

Kwok graduated from Joseph's College in Hong Kong. After graduating from secondary school, Kwok worked as a junior staff in King Fook Gold & Jewellery Co. Ltd. His father, who owns a small gold retail store, desired that he gain experience in the business with the view of eventually handing the family business over to him. If not for one of Kwok's brothers taking over the gold business, his father would not have allowed him to join the entertainment industry.

Kwok has been in a serious relationship with Chinese-born actress Lynn Hung since 2006.

Samuel Kwok is a martial arts practitioner and teacher in the Chinese art of Wing Chun.

Samuel Kwok was born in Hong Kong in 1948, the son of a Church Minister. His interest in the martial arts started at an early age, his first experience was in White Crane Kung Fu, under the guidance of his uncle Luk Chi Fu. His Wing Chun training first started in 1967 under Chan Wai Ling in Hong Kong.

In 1972 Samuel Kwok came to the UK to study psychiatric nursing and pursue a new life. Living in London then, he went to the Church of Reverend Kao, he told him about one of the members of the congregation, a Wing Chun teacher called Lee Sing, who started teaching Samuel Kwok in 1973.

In 1978 he returned to Hong Kong in hope to find the true source of Wing Chun. Samuel Kwok was introduced to Ip Chun by Lee Sing; who at the time was joining the Ip Man Martial Arts Association. It was during a second meeting with Ip Chun that he offered to teach Samuel Kwok the Wooden Dummy techniques, realizing that he was being given a great honour he accepted. At this time, Ip Chun was only teaching part time.