Title: Chinese language
Content:  Unless otherwise specified, Chinese in this article is written in simplified Chinese/traditional Chinese; pinyin order. If the simplified and traditional characters are the same, they are written only once. Chinese ( or also, especially for the written language) is a group of languages that form the Sinitic branch of the Sino-Tibetan languages, spoken by the ethnic Han Chinese majority and many minority ethnic groups in Greater China. About 1.3 billion people (or approximately 16% of the world's population) speak a variety of Chinese as their first language. The spoken varieties of Chinese are usually considered by native speakers to be variants of a single language. 
Title: Chinese Wikipedia
Content:   The Chinese Wikipedia is based on written vernacular Chinese, the official Chinese written language in all Chinese-speaking regions, including mainland China, Taiwan, Hong Kong, Macau, and Singapore. This register is largely associated with the grammar and vocabulary of Standard Chinese, the official spoken language of mainland China, Taiwan, and Singapore (but not exclusively of Hong Kong and Macau, which largely use Cantonese). The varieties of Chinese are a diverse group encompassing many regional topolects, most of which are mutually unintelligible and often divided up into several larger dialect groups, such as Wu (including Shanghainese and Suzhounese), Min Nan (of which Taiwanese is a notable dialect), and Cantonese. In regions 
Title: Lingnan culture
Content:  Like the rest of East Asia, Lingnan traditionally used classical Chinese for writing, rather than the peoples' spoken languages. Despite the attempt to create vernacular forms of writing in the late 19th century, the Greater China area still tend to use standard written Chinese, a writing system based on Mandarin, not Cantonese (i.e., the native language of the Lingnan region), in writing. Even in cosmopolitan Hong Kong, the vast majority of the people's works of literature have been written in standard written Chinese. However, starting from the 21st century, Hong Kong, as a cultural center in the region, has developed a complete writing system for Cantonese. Some writers in the city now advocate composing literature in written Cantonese.
Title: Han Chinese
Content:  all varieties and has taken up the dominant position among written forms, formerly occupied by literary Chinese. Thus, although residents of different regions would not necessarily understand each other's speech, they generally share a common written language, Standard Written Chinese and Literary Chinese (these two writing styles can merge into a 半白半文 writing style). From the 1950s, Simplified Chinese characters were adopted in mainland China and later in Singapore and Malaysia, while Chinese communities in Hong Kong, Macau, Taiwan and overseas countries continue to use Traditional Chinese characters. Although significant differences exist between the two character sets, they are largely mutually intelligible.
Title: Languages of China
Content:  language – Khitan large and small scripts ; The Tanguts (Sino-Tibetan people) – Tangut language – Tangut script Chinese ; Manchu ; Mongol ; Tibetan ; Chagatai 'Phags-pa script Mongol ; Tibetan ; Arabic (for Uyghur) ; Latin (for Zhuang) Nüshu script  The following languages traditionally had written forms that do not involve Chinese characters (hanzi):  Many modern forms of spoken Chinese languages have their own distinct writing system using Chinese characters that contain colloquial variants. These typically are used as sound characters to help determine the pronunciation of the sentence within that language: Some non-Sinitic peoples have historically used Chinese characters:  
Title: Languages of China
Content:  Uyghurs – Uyghur language – Uyghur Arabic alphabet ; The Xibe – Xibe language – Manchu alphabet ; The Yi – Yi language – Yi syllabary Written Cantonese ; Chữ nôm – Vietnamese ; Written Hokkien ; Shanghainese The Koreans – Korean language – Hanja ; The Zhuang (Tai people) – Zhuang languages – Sawndip ; The Bai people - Bai language - Bai writing(僰文) ; The Dong people - Dong language (China) - Dong writing(方塊侗字) ; The Bouyei people - Bouyei language - Bouyei writing(方塊布依字) The Jurchens (Manchu ancestors) – Jurchen language – Jurchen script ; The Khitans (Mongolic people) – 
Title: Chinaknowledge
Content:  script (Orkhon script) ; The 'Phags-pa script ; The Manchu script ; The Nü shu "women's script" With 1.5 billion speakers, the Chinese language is the most spoken language of the world. It is nevertheless one single language that is spoken in the same form in all parts of China, nor has it been unchanged over time. The script by which the Chinese language is written is an ideographic script embedded into clouds of mystery. It is an obstacle for education and literacy and has nevertheless been used for a vast treasury of literature. And it has provided an example for the scripts of neighbouring states. This part of the encyclopedia provides an introduction into important aspects of both the Chinese language and the Chinese script. Chinese language  Chinese script (characters)  Derivates of the Chinese script  Other scripts used in China 
Title: Standard language
Content:  Literary Chinese had been replaced as the written standard by written vernacular Chinese, which was based on Mandarin dialects. In the 1930s, Standard Chinese was adopted, with its pronunciation based on the Beijing dialect, but with vocabulary also drawn from other Mandarin varieties and its syntax based on the written vernacular. It is the official spoken language of the People's Republic of China (where it is called Pǔtōnghuà "common speech"), the de facto official language of the Republic of China governing Taiwan (as Guóyǔ "national language") and one of the official languages of Singapore (as Huáyǔ "Chinese language"). Standard Chinese now dominates public life, and is much more widely studied than any other variety of Chinese.
Title: Culture of Hong Kong
Content:  In terms of writing systems, Hong Kongers write using Traditional Chinese characters, which not only employ, under varying circumstances, variant and classical characters used since imperial years, but also cover all of the words in Mandarin-based Vernacular Chinese, the language in which government documents and most works of literature are written. With the aid of Cantonese characters invented by Hong Kongers, the Cantonese language can now be written verbatim, and written Cantonese have been becoming more prevalent since the turn of the 21st century, especially in less formal spheres such as internet forums and advertisements.
Title: Written Hokkien
Content:  Prior to the modern era, the main written language of China was Classical Chinese, which has grammar and vocabulary based on Old Chinese used in ancient times. Whilst the written form of Chinese mostly remained static, the spoken varieties of Chinese diverged from Old Chinese. In the early 20th century, reformers in China saw the need for language reform and championed the development of a writing system that allowed Chinese people to write the language the same way they speak, a system called written Vernacular Chinese. Because the various Mandarin Chinese dialects had the largest number of speakers amongst all varieties of Chinese, it was chosen as the 

Question: what language do chinese people write in?
Answer: Traditional Chinese characters.