What cultural faux pas should I try to avoid making in Ulsan?

"When visiting Ulsan, it's important to respect the local customs and traditions to avoid any cultural faux pas. Firstly, never use one hand when giving or receiving anything, especially money or business cards. Always use both hands as a sign of respect. Avoid pointing with your finger, as it is considered rude. Instead, use your whole hand to gesture. When dining, wait for the eldest person to start eating before you begin. It's also considered impolite to leave the table before the eldest person. Avoid blowing your nose in public, especially at the dining table, as it is considered extremely rude. Do not write a person's name in red ink as it symbolizes death and is considered very unlucky. Avoid touching someone, especially someone of the opposite sex, unless you are very close or intimate with them. Personal space is highly valued in Korean culture. Lastly, remember to remove your shoes when entering someone's home or even some traditional restaurants. It's a sign of respect and a common practice in Korea," remarked another expat in Ulsan, Korea.