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

"In Ilsan, it's considered rude to blow your nose in public, especially at the dining table. Avoid pointing with your fingers, as it's seen as disrespectful; instead, use your whole hand. When meeting someone for the first time, bow slightly as a sign of respect. Avoid touching, hugging, or making any physical contact, especially with someone you've just met, as Koreans value personal space. When eating, wait for the eldest person to start eating before you do. Never leave chopsticks sticking upright in your rice bowl, as it's associated with funerals. Also, avoid writing someone's name in red ink, as it symbolically means that the person is dead or is about to die. In Korea, it's considered impolite to refuse a drink offered by an elder or superior. However, when accepting the drink, use both hands to hold the glass as a sign of respect. When it comes to tipping, it's not customary in Korea and can sometimes be seen as insulting. Avoid discussing sensitive topics such as politics, North Korea, and the Korean War. Koreans are very proud of their culture and heritage, so showing appreciation and respect towards their customs, traditions, and national symbols is highly appreciated," remarked another expat in Ilsan, Korea.