Guardian Auctions has handled many of China's valuable cultural relics over their 20 years in business. Now, a retrospective exhibition displays some of the most breathtaking pieces of China's past that have passed through their hands. Lin Qi reports.

An Ode to Dispatching Troops is seen as a model of Chinese fine calligraphy and is now on display at a retrospective exhibition The China Guardian Age at the National Museum of China. Photos provided to China Daily

Several decades after their split in the social chaos of the 1920s, a Sui Dynasty (AD 581-618) calligraphy work, which used to be part of the Qing Dynasty (1644-1911) court collection, has been reunited with its postscript in Beijing.

The work in its entirety is now on public display at the National Museum of China.

An Ode to Dispatching Troops (Chu Shi Song) by an anonymous writer exemplifies a distinctive calligraphic script, zhang cao, or draft cursive, only a few examples of which are still in existence today. The style provides traces of the transformation from early scripts, the clerical script (li shu) for example, to the dominating scripts of recent centuries such as running (xing shu) and cursive (cao shu) styles.

The postscript was written by Zhang Dashan, an influential scholar of the Yuan Dynasty (1271-1368), and describes his research into the content, historical background and author of An Ode to Dispatching Troops.

Seen as a model of fine calligraphy, the work's engraved version was included in the San Xi Tang Fa Tie, a court compilation of royal collections named after Qing Emperor Qianlong's study.

The work left the Forbidden City in 1922 as a reward from last emperor Pu Yi to his brother. Its main text and postscript was later separated and held in different private hands.

In 2003, the main body of the work appeared at China Guardian Auctions' spring sale, and was acquired by the Palace Museum at the price of 22 million yuan ($3.6 million).

In September, Guardian Auctions purchased 50 percent of the rights to the postscript's ownership, and together with its then owner Lu Mutao, donated the piece to the Palace Museum. Both Guardian Auctions and Lu declined to reveal the dealing price.

The display of An Ode to Dispatching Troops is the highlight of a retrospective exhibition, The China Guardian Age, celebrating the 20th anniversary of Guardian Auctions' establishment.

The Beijing-headquartered international auction house has put more than 280,000 lots under the hammer in 1,100-odd sales since its debut auction. A selection of nearly 400 paintings, antiques, sculptures, timepieces, jewelry, coins and stamps are on show as testimony to the moments of heated bidding and record-breaking sales at various auctions.

The exhibits are on loan from important collectors including the public Shanghai Museum, the private Long Museum which was founded by self-made billionaires and art collectors Liu Yiqian and Wang Wei, and Taikang Life Insurance whose chief executive officer Chen Dongsheng founded Guardian Auctions.