Dear Mr. / Ms,
On the occasion of the th anniversary of your National Day, please accept our heartiest congratulations. May the trade connections between our countries continue to develop with each passing day!
Yours faithfully
尊敬的先生/小姐，
值此国庆X周年之际，请接受我们最真诚的祝贺。愿我们两国之间的贸易联系持续发展。
你诚挚的，