Написать речь - "you inform someone that you finished the course successfully", "family member ran a marathon or other sport event after training hard"

1) you inform someone that you finished the course successfully
I have fought a good fight and finally I have finished my language courses in
China. I successfully passed all exams and I am sure that studying in China is
worth it. I am extremely grateful to my Chinese professors for running it, it's been
a real pleasure! The two things I most appreciate about the course are the structure
and the assignments. The course is indeed well structured – the choice of the book
is excellent – which worked to my advantage and somehow motivated me not only
to do the course tasks themselves, but also to persevere with myself-study too. The
assignments created by Chinese professors are inspirational, relevant and clear. Of
course sometimes studying in China was hard as in the beginning I couldn’t speak
Chinese at all so I didn’t understand anything. But I have got a good experience
and lots of knowledges. I'm grateful for your wishes and greetings on the occasion
of finishing Chinese courses. Thank you for your support.
Nowadays China has become one of the most popular study abroad destinations for
international students because of its long history and exciting culture. So I
recommend it to everyone!

2) family member ran a marathon or other sport event after training hard
The idea of running a marathon wasn’t too bold and unexpected for me. Sam, my
dear brother, you have already finished two half-marathons the previous year, and
though it was quite a challenge. You were planning to finish a marathon in less
than 4 hours, which is a good time for someone like you. Those two half-
marathons you ran almost without specific preparation - you run for fun, and you
are active in the gym, but you didn’t use specific programs. This time you have
decided that it is time to get closer to “professional amateur” runners. I was sure
that I would do a marathon! Three hundred meters before the finish, you were
doing the finishing spurt! You probably could have done it earlier, but the finish
itself was not visible, so you couldn’t plan it good enough. At the finish, you grab
a medal and try to enjoy the sensation of a great deed. Congratulations to you on
winning this prestigious award.

I can say that your decision to take part in this run made me feel very proud of you,
and now you can have bigger goals—both in sports, education, and my future
career. You are the best brother in the world and I wish you all the best!