Re gan mian is what Wuhan eats for breakfast, sold from carts in paper bowls and mixed standing up. The noodles are cooked ahead, cooled and oiled, then flashed back through hot water to order, which is why they stay springy rather than soft.
The sauce is sesame paste rather than peanut, and it must be loosened properly with warm water before anything else goes in. Mix it all together hard at the table; it arrives looking unmixed by design.