picked up a small batch of chinese coins, their reverse is blank to so much to see..

here is the obverse side of the coins..

here is my best attempt at attribution left to right..
left:northern song, emperor hui zong, 1101-1125ad, "10 cash", chong ning zhong bao ("sublime, peaceful, heavy, currency...read top, bottom, left, right), 33mm, 9.3g.
middle: northern song, emporer shen zong, 1068-1085ad, yuan feng tong bao (seal script?), 1 cash coin. 29mm, 5.9g
rigth: tang dynasty, minted after 620ad...not sure exactly when...maybe as late as 907 (end of tang?), seems this type of coin was minted under different rulers? kai yuan tong bao, 25 mm, 3.4g.
if anyone can tell me anything else or correct my attribution, I would appreciate it!
where's GG (gil-galad)...isn't he a chinese coin expert? or was that BH (bob helm)? I sure as heck know it isn't me!
