The first plant i ever chose was a Polygonum Baldschuanicum. The intention was to quickly cover the fence in my tiny garden so that all the overlooking windows couldn't see my West facing patio. It did that within 3/6 months. The next year it looked fab when in flower. The following year my fence came down in the wind but the plant stayed in place, I was really pleased with it but I was young and naive and soon moved house.
I read later that it had changed name to Fallopia Baldschuanica. Fallopia is the family name of Japanese Knotweed.
I can't see the leaves closely but I don't think they are the arrow shape that I remember, the leaves of Russian Vine or Mile a Minute are very arrow shaped and shiny. It also twirls its tendrils very quickly and tightly so I think it would be more "knotted" or "knitted" than we see in the photos if it was my friend from long ago.
We'll soon find out though so keep us informed Wilbo1Para.