This collection is chongning tongbao, which is the beginning of the reign of zhao ji chongning of the northern song dynasty (1102-1106), and the money of the New Year, which includes three kinds: chongning tongbao, chongning chongbao and chongning yuanbao. Chongning tong bao, qian wen for huizong, so it is the royal book money. This qian wen calligraphy is thin and thin, iron row silver hook, is the huizong zhaoji thin gold book body to preserve the world's real appearance. Bei song more clue for cast money, from 96% to 96.7% higher than worship officer at that time cause a rather heavy treasure, NingYuanBao, in follwed said "money method 2 SAN", is the highest value in bronze money now one of the two COINS. The money was heavy, bronze, rusty, old, and open. This is the big word version, so it is full of four words, send the border. "Bao, ning" has a long and left-leaning crown; Long "chong"; Slanting "ning"; The high "tong", and the widely recognized word "chongning tong bao". This collection is rare collections of jack, extremely rare, intact, this collection can be called a national treasure, it undoubtedly it is a casting mother money (specimen) especially ning words more than a dot in the existing similar currency only this one. It is a rare and precious commodity in the market. It has great collection value and investment value. Is a rare collection of heavy equipment. This collection has a high collection value and investment value, welcome to inquire.