Klas Bernhard Johannes Karlgren was a Swedish sinologist and linguist who pioneered the study of Chinese historical phonology using modern comparative methods. In the early 20th century, Karlgren conducted large surveys of the varieties of Chinese and studied historical information on rhyming in ancient Chinese poetry, then used them to create the first ever complete reconstructions of what are now called Middle Chinese and Old Chinese.

Jönköping is a city in southern Sweden with 112,766 inhabitants (2022). Jönköping is situated on the southern shore of Sweden's second largest lake, Vättern, in the province of Småland. In late 2019, Jönköping was seen as the city with best future prospects in Sweden by WSP.