1. My parents are retired, my elder brother has been working for three years since he graduated from a military academy, and my younger brother now works in Shen Zhen.
2. “Culture tourism, safety first” is not a sentence and there’s a spelling mistake in it.
3. I worked as a guide and interpreter for a group from overseas at the conference.
4. Your letter dated October 22nd didn’t provide the necessary original order number.