In 1930, the German sinologist Eric Hauer argued forcibly that knowing Manchu allows the scholar to render Manchu personal and place names that have been "horribly mutilated" by their Chinese transliterations and to know the meanings of the names. He goes on that the Manchu translations of Chinese classics and fiction were done by experts familiar with their original meaning and with how best to express it in Manchu, such as in the Manchu translation of the "Peiwen yunfu". Because Manchu is not difficult to learn, it "enables the student of Sinology to use the Manchu versions of the classics […] in order to verify the meaning of the Chinese text". Currently, several thousand people can speak Manchu as a second language through primary education or free classes for adults offered in China. However very few native Manchu speakers remain. In what used to be Manchuria virtually no one speaks the language, the entire area having been completely sinicized. As of 2007, the last native speakers of the language were thought to be 18 octogenarian residents of the village of Sanjiazi (), in Fuyu County, in Qiqihar, Heilongjiang Province. A few speakers also remain in Dawujia village in Aihui District of Heihe Prefecture. The Xibe (or Sibe) are often considered to be the modern custodians of the written Manchu language. The Xibe live in Qapqal Xibe Autonomous County near the Ili valley in Xinjiang, having been moved there by the Qianlong Emperor in 1764. Modern written Xibe is very close to Manchu, although there are slight differences in the writing system which reflect distinctive Xibe pronunciation. More significant differences exist in morphological and syntactic structure of the spoken Xibe language. For one example among many, there is a "converb" ending, -"mak", that is very common in modern spoken Xibe but unknown in Manchu. Recently, there have been increased efforts to revive the Manchu language. Revival movements are linked to the reconstruction of ethnic Manchu identity in the Han-dominated country. The Manchus mainly lead the revival efforts, with support from the PRC state, NGOs and international efforts. Revivalism began in the post-Mao era when non-Han ethnic expression was allowed. By the 1980s, Manchus had become the second largest minority group in China. People began to reveal their ethnic identities that had been hidden due to 20th century unrests and the fall of the Qing Empire.