From the Hanyu Pinyin romanization of the Mandarin 定日 (Dìngrì).

Dingri

1. Synonym of Tingri: the Mandarin Chinese-derived name.
   • 2016 May 11, Alice Yan, “Tibet to blacklist graffitiing tourists at Everest scenic site”, in South China Morning Post‎^[1], →ISSN, →OCLC, archived from the original on May 03, 2019, Society‎^[2]:

     Gu Chunlei, deputy tourism director of Tibet’s Dingri county, said more than 40,000 tourists visited the zone last year and an increasing number were leaving their names on its monuments, Xinhua reports.

• dingir, Ingrid, Riding, grid-in, riding