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

"In Incheon, it is considered rude to blow your nose in public, especially at the dining table. Avoid pointing with your fingers, as it is seen as disrespectful; instead, use your whole hand. When meeting someone for the first time, it is customary to bow slightly as a sign of respect. Avoid making direct eye contact with elders or superiors as it can be seen as a challenge or disrespect. When dining, wait for the eldest person to start eating before you do. It's also important not to stick your chopsticks upright in your rice bowl, as this is associated with funerals. Avoid touching someone of the opposite sex in public, as public displays of affection are generally frowned upon. In Korea, it's considered impolite to refuse a drink offered by an elder or superior. However, when receiving the drink, make sure to use both hands to show respect. Also, it's customary to turn your head away when drinking in front of elders. Avoid writing a person's name in red ink, as it symbolizes death. Lastly, remember to remove your shoes before entering someone's home, as it's considered disrespectful to wear shoes indoors," remarked another expat in Incheon, Korea.