Kuomintang "Big Knife" Soldier

First attempt at colorizing an image, I decided on this admittedly poor-quality portrait. While it's not entirely clear, my research seems to indicate that this particular soldier was fighting under General Feng Yuxiang. I've seen dates attached to this image ranging from the mid-20's to mid-30's. Judging by his uniform and the seeming poor quality of his Dadao (the titular Big Knife,) I believe it's likely to date towards the end of that period, when General Yuxiang was supporting the Kuomintang forces.

Done