Just the other day I wrote about the importance of tech cards in Dcity in order to level up your buildings. One of the most important right now is central banks and they come with a hefty price tag.
Today I unlocked my first tech card!
The GMO farming card allows me to now earn +4 income and -3 popularity on my farms. While I don't have any yet and honestly I might now I could possibly sell this card. However since it's my first and only I'm going to hold on to it and hopefully use it to my advantage here soon in order to level up the city faster.