Tongzhi porcelain is Chinese porcelain from the reign of the Qing dynasty Tongzhi Emperor (1862–1874), which saw the reconstruction of the Jingdezhen official kilns after the Taiping Rebellion of the 1850s completely devastated the cities of Nanjing and Jingdezhen.
The Jingdezhen Ceramic Institute (景德镇陶瓷大学) is situated in Jingdezhen city in Jiangxi province in the People's Republic of China.
 It is the only institute of higher learning in China dedicated to the study of ceramic arts.
 The area of Jingdezhen is historically significant in the development and production of Chinese ceramics.
 Thus, this university serves the role of linking up modern educational techniques and infrastructure with a well-rooted source of ancient Chinese lore and tradition.
 Its prominent graduated students are artists such as Jackson Li.
Jingdezhen (or the Town of Jingde) is a prefecture-level city, previously a town, in northeastern Jiangxi province, China, with a total population of 1,554,000 (2007), bordering Anhui to the north.
 It is known as the "Porcelain Capital" because it has been producing pottery for 1,700 years.
 The city has a well-documented history that stretches back over 2,000 years.
Langfang (), is a prefecture-level city of Hebei Province, which was known as Tianjin Prefecture until 1973.
 Hebei province was renamed Langfang Prefecture after Tianjin became a municipality and finally upgraded into a prefecture-level city in 1988.
 Langfang is located approximately midway between Beijing and Tianjin.
 At the 2010 census, the population of Langfang was 4,358,839, of whom 868,066 lived in the built-up ("or metro") area made of Guangyang and Anci districts; its total area is around 6417.28 km² .
 Langfang borders Baoding to the southwest, Cangzhou to the south (both prefecture-level cities of Hebei), Beijing to the north and Tianjin to the east.
 Sanhe City and Dachang Hui County are now conurbated with Beijing, so that they form part of the same built-up area.
 Langfang is the smallest prefecture-level city of Hebei Province by land area.
Prefectures, formally a kind of prefecture-level divisions as a term in the context of China, are used to refer to several unrelated political divisions in both ancient and modern China.
 There are 333 prefecture-level divisions in China.
 They include 17 prefectures and 283 prefecture-level cities.
 Other than provincial level divisions, prefectural level divisions are not mentioned in the Chinese constitution.
Greater Changsha Metropolitan Region or Changsha-Zhuzhou-Xiangtan City Cluster () is a large area in Hunan province, China, consisting of three prefecture-level cities of Changsha, Xiangtan and Zhuzhou, the place is the heavily urbanized region of Hunan and covers an area of 28,087 km.
 It covers an area of 1,883 km in the urban area with 5.92 millions of popupation, GDP reaches CN￥ 568.37 billions(US$ 90.04 billions), GDP per capita is CN￥ 96,067(US$ 15,665), the core area of three cities (Changzhutan metropolis) has an area of 483.77 km in 2012.
 On December 14, 2007, it was issued as Comprehensive Supporting Reform Trial Areas to build a resource conserving and environment friendly society by China NDRC.
Rose Kerr (born February 1953) is an English art historian specializing in Chinese art, especially Chinese ceramics, on which she has written a number of books.
 She was the Keeper of the Far Eastern Department at the Victoria & Albert Museum in London until 2003.
 In 2015, she was made an honorary citizen of Jingdezhen, China, the historic centre of Chinese porcelain production, in recognition of her academic research on Jingdezhen ceramics, and her promotion of cultural exchange between the United Kingdom and China.
 She was the first non-Chinese citizen to be so honoured.
Ya'an (, Tibetan: Yak-Nga [གཡག་རྔ་]) is a prefecture-level city in the western part of Sichuan province, China, located just below the Tibetan Plateau.
Jingdezhen Luojia Airport () (IATA: JDZ, ICAO: ZSJD) is an airport serving Jingdezhen, a city in the province of Jiangxi in the People's Republic of China.
Jingdezhen porcelain (Chinese: 景德镇陶瓷) is Chinese porcelain produced in or near Jingdezhen in southern China.
 Jingdezhen may have produced pottery as early as the sixth century CE, though it is named after the reign name of Emperor Zhenzong, in whose reign it became a major kiln site, around 1004.
 By the 14th century it had become the largest centre of production of Chinese porcelain, which it has remained, increasing its dominance in subsequent centuries.
 From the Ming period onwards, official kilns in Jingdezhen were controlled by the emperor, making imperial porcelain in large quantity for the court and the emperor to give as gifts.

Question: Are Jingdezhen and Ya'an both prefecture-level cities in China?
Answer: yes