名詞 founding:

1. the act of starting something for the first time; introducing something new
   同義詞：initiation, foundation, institution, origination, creation, innovation, introduction, instauration

動詞 found:

1. set up or found
   同義詞：establish, set up, found, launch
2. set up or lay the groundwork for
   同義詞：establish, found, plant, constitute, institute
3. use as a basis for; found on
   同義詞：establish, base, ground, found

1. We commemorate the founding of our nation with a public holiday.
   我們放假一日以慶祝國慶。
2. This business company was founded in 1724.
   這家商業(yè)公司建立于1724年。
3. After the founding of the People's Republic of China entered upon a new historical stage.
   人民共和國成立后，中國就進入了一個新的歷史時期。