We congratulated him on his being admitted to the Party.
⇑ Translate the sentence above by Google ⇑
Related: congratulate
Prev: I congratulated him on having passed the examination.
Next: A small official under him heard that he was born in the year of "the rat". To curry2 the official's favour, he had a gold rat cast as a birthday present and went to the official's house to congratulate him on his birthday.