Chris Brantley has a page with advice on scratch-building wargames terrain. It’s aimed at newbies in general, and DBA players in particular.
DBA
DBA Chinese Gallery and Dragon Tail Banner
Bill MacGillivray has a nice gallery of his Shang Chinese DBA army, and a Dragon Tail banner for you to save and print on your inkjet.The banner is in 15mm, but I’m going to resize it and use it for my Boxer Rebellion armies in 28mm.