Hi chulminJ00,
Only in English for the benefit of all but i understand you might have a language issue here. I tried to Google translate what you wrote but the translator does not do a good job as it just does not make sense.
Are you able to get help from a Korean friend to better express your questions and to understand the advice given to you? As even if any of us can give you a helpful reply, you might not be able to comprehend it properly.. not a fault of yours though.
Regards,
GS