Greetings dear @sochul
I had too much time without writing, but always remembering the beginnings in steemit.com when I wrote to you in Spanish and then in English because the Korean translation was incorrect.
Really when you perform the same activities for 20 or 30 years is because you like and feel good about what is being done, the other would be to work only for the money to survive.
I have worked since 1996 on the subject of semiconductors (Solid State Physics) and now I had to emigrate from my country due to political problems and I must dedicate myself to other activities in another country.
For now, I have dedicated myself to write in steemit to make extra money for maintenance, but as you say, I think it was time to retire from these activities and dedicate myself to other things.
It was a pleasure to contact you and say hello again.