It was cloudy and very cold.
In the morning we had a lecture, and in the afternoon we visited the construction site to build an express roadway tunnel to understand better. The office was newly opened and very beautiful. They say these days there are many women engaged in construction work and they try to provide clean toilets for them.
I found an interesting sign board of doing guu paa movement. Do you know janken(じゃんけん), paper, stone, and scissors? In that game stone is guu and paper is paa. In this guu paa movement, guu means OK, and paa means stop. At the construction site, it is so noisy that they use sign language for safety. Isn't it good?