His birthday was yesterday. Born in Purworedjo, Indonesia, he now lives in Haarlem, the Netherlands.

From Lambiek:

"In April 2023, on the occasion of the artist's upcoming 90th birthday, a large overview exposition of Thé Tjong-Khing's work was curated by Tonio van Vugt in the Verwey Museum in Haarlem. The exhibition also offers room for a selection of illustrators who are inspired by Thé Tjong-Khing's work, consisting of Emanuel Wiemans (1975), Marloes de Vries (1984), Janneke Ipenburg (1979) and Branco Suijkerbuijk (2005)."

https://www.google.com/search?q=Th%C3%A9+Tjong-Khing+90&rlz=1CARWDO_enUS1069&ei=-ePNZLG9G76GptQP4aGV6A8&ved=0ahUKEwjxnfSe6sSAAxU-g4kEHeFQBf0Q4dUDCBA&uact=5&oq=Th%C3%A9+Tjong-Khing+90&gs_lp=Egxnd3Mtd2l6LXNlcnAiE1Row6kgVGpvbmctS2hpbmcgOTAyBRAhGKABMgUQIRigAUizDFCEA1jdCXABeACQAQCYAeIBoAHPBKoBBTAuMi4xuAEDyAEA-AEBwgIIEC4YgAQYsAPCAgkQABgHGB4YsAPCAgoQABiKBRiwAxhDwgIHEAAYHhiwA8ICCRAAGAgYHhiwA8ICBRAAGIAEwgIGEAAYFhge4gMEGAEgQYgGAZAGCQ&sclient=gws-wiz-serp#ip=1
(birthday tributes - in Dutch)

http://www.cobra.be/cm/cobra/boek/130613-sa-thetjongkhing
(in Dutch, about his birthday)

http://translate.google.com/translate?hl=en&sl=nl&u=http://www.cobra.be/cm/cobra/boek/130613-sa-thetjongkhing&prev=/search%3Fq%3Dtjong%2Bkhing%2B80%26biw%3D1280%26bih%3D885
(rough translation of the above)

https://www.google.com/search?hl=en&gl=us&tbm=nws&authuser=0&q=Th%C3%A9+Tjong-Khing&oq=Th%C3%A9+Tjong-Khing&gs_l=news-cc.3...891.891.0.937.1.1.0.0.0.0.0.0..0.0...0.0...1ac.1.
(other recent articles, in Dutch and Italian)

He was nominated for the Hans Christian Andersen Award in 1972, 1988, 2008, and 2018.

https://www.kirkusreviews.com/author/tjong-khing-1/
(two Kirkus reviews)

https://www.publishersweekly.com/9781776574933
(one PW review)

https://www.goodreads.com/author/show/796304.Th_Tjong_Khing
(reader reviews)

Titles in English include (I may not have all the dates right):

Animals of Farthing Wood by Colin Dann, 1979.

Little Sophie and Lanky Flop by Els Pelgrom, 1987

City of Gold by Peter Dickinson, 1987

Look, Listen and Play by Joke Van Leeuwen, 1988.

Mark The Big Fish. 1992

Andrew's Angry Words by D. Lachner, 1995

Don't read this! : and other tales of the unnatural. 1998

Andy and Tamika by David A. Adler and Will Hillenbrand, 2005

Where is the cake? 2005

The Birthday Cake Mystery 2012

en.wikipedia.org/wiki/Thé_Tjong-Khing

http://images.google.com/images?um=1&hl=en&q=%22Th%C3%A9+tjong+khing%22+
(more photos & artwork)

http://www.lambiek.net/artists/t/tjong_khing.htm
(short bio, adult content)

Excerpt:

"After a brief period at the Indonesian Art School, he came to live in The Netherlands in 1956."
http://www.thetjongkhing.nl/
(His website, in Dutch. This has some covers - they include illustrations for the stories of Perseus, Bellepheron, Cinderella, & Adam & Eve.)

http://translate.google.com/translate?hl=en&sl=nl&u=http://www.thetjongkhing.nl/&prev=/search%3Fq%3Dtjong%2Bkhing%26biw%3D1280%26bih%3D885
(his website in English)

https://literaturfestival.com/en/authors/the-tjong-khing/
(2008 article; quote: "His works – over one hundred fifty in number – are illustrations of fairy tales and myths.")

http://www.theguardian.com/childrens-books-site/2012/dec/18/family-review-the-birthday-cake-mystery-the-tjong-khing
(review of "The Birthday Cake Mystery" from 2012)

https://www.youtube.com/results?search_query=tjong+khing
(videos)