This symbol is taken from the chinese alphabet.
土 (phonetic: “tŭ”) means “soil”, “earth”, “land”, which seemed appropriate for an young soil engineer like me.
But why chosing this logo? This is simple…
I was trying to stylize my initials: “TF”.
During a creative burst, I realized that when these letters are merged and flipped upside down, it almost looked at 土.