Sun Tzu can boast an exceptionally long distinguished roll of commentators, which would do honor to any classic. Ou-yang Hsiu remarks on this fact, though he wrote before the tale was complete, and rather ingeniously explains it by saying that the artifices of war, being inexhaustible, must therefore be susceptible of treatment in a great variety of ways.
1. TS`AO TS`AO or Ts`ao Kung, afterwards known as Wei Wu Ti [A.D. 155-220]. There is hardly any room for doubt that the earliest commentary on Sun Tzu actually came from the pen of this extraordinary man, whose biography in the SAN KUO CHIH reads like a romance. One of the greatest military geniuses that the world has seen, and Napoleonic in the scale of his operations, he was especially famed for the marvelous rapidity of his marches, which has found expression in the line "Talk of Ts`ao Ts`ao, and Ts`ao Ts`ao will appear." Ou-yang Hsiu says of him that he was a great captain who "measured his strength against Tung Cho, Lu Pu and the two Yuan, father and son, and vanquished them all; whereupon he divided the Empire of Han with Wu and Shu, and made himself king. It is recorded that whenever a council of war was held by Wei on the eve of a far-reaching campaign, he had all his calculations ready; those generals who made use of them did not lose one battle in ten; those who ran counter to them in any particular saw their armies incontinently beaten and put to flight." Ts`ao Kung's notes on Sun Tzu, models of austere brevity, are so thoroughly characteristic of the stern commander known to history, that it is hard indeed to conceive of them as the work of a mere LITTERATEUR. Sometimes, indeed, owing to extreme compression, they are scarcely intelligible and stand no less in need of a commentary than the text itself. [40]
2. MENG SHIH. The commentary which has come down to us under this name is comparatively meager, and nothing about the author is known. Even his personal name has not been recorded.
Chi T`ien-pao's edition places him after Chia Lin,and Ch`ao Kung-wu also assigns him to the T`ang dynasty, [41] but this is a mistake. In Sun Hsing-yen's preface, he appears as Meng Shih of the Liang dynasty [502-557]. Others would identify him with Meng K`ang of the 3rd century. He is named in one work as the last of the "Five Commentators," the others being Wei Wu Ti, Tu Mu, Ch`en Hao and Chia Lin.
3. LI CH`UAN of the 8th century was a well-known writer on military tactics. One of his works has been in constant use down to the present day. The T`UNG CHIH mentions "Lives of famous generals from the Chou to the T`ang dynasty" as written by him.
[42] According to Ch`ao Kung-wu and the T`IEN-I-KO catalogue, he followed a variant of the text of Sun Tzu which differs considerably from those now extant. His notes are mostly short and to the point, and he frequently illustrates his remarks by anecdotes from Chinese history.
4. TU YU (died 812) did not publish a separate commentary on Sun Tzu, his notes being taken from the T`UNG TIEN, the encyclopedic treatise on the Constitution which was his life-work. They are largely repetitions of Ts`ao Kung and Meng Shih, besides which it is believed that he drew on the ancient commentaries of Wang Ling and others. Owing to the peculiar arrangement of T`UNG TIEN, he has to explain each passage on its merits, apart from the context, and sometimes his own explanation does not agree with that of Ts`ao Kung, whom he always quotes first. Though not strictly to be reckoned as one of the "Ten Commentators," he was added to their number by Chi T`ien-pao, being wrongly placed after his grandson Tu Mu.
5. TU MU (803-852) is perhaps the best known as a poet -- a bright star even in the glorious galaxy of the T`ang period. We learn from Ch`ao Kung-wu that although he had no practical experience of war, he was extremely fond of discussing the subject, and was moreover well read in the military history of the CH`UN CH`IU and CHAN KUO eras. His notes, therefore, are well worth attention. They are very copious, and replete with historical parallels. The gist of Sun Tzu's work is thus summarized by him: "Practice benevolence and justice, but on the other hand make full use of artifice and measures of expediency."He further declared that all the military triumphs and disasters of the thousand years which had elapsed since Sun Tzu's death would, upon examination, be found to uphold and corroborate, in every particular, the maxims contained in his book. Tu Mu's somewhat spiteful charge against Ts`ao Kung has already been considered elsewhere.
6. CH`EN HAO appears to have been a contemporary of Tu Mu.
Ch`ao Kung-wu says that he was impelled to write a new commentary on Sun Tzu because Ts`ao Kung's on the one hand was too obscure and subtle, and that of Tu Mu on the other too long-winded and diffuse. Ou-yang Hsiu, writing in the middle of the 11th century, calls Ts`ao Kung, Tu Mu and Ch`en Hao the three chief commentators on Sun Tzu, and observes that Ch`en Hao is continually attacking Tu Mu's shortcomings. His commentary, though not lacking in merit, must rank below those of his predecessors.
7. CHIA LIN is known to have lived under the T`ang dynasty, for his commentary on Sun Tzu is mentioned in the T`ang Shu and was afterwards republished by Chi Hsieh of the same dynasty together with those of Meng Shih and Tu Yu. It is of somewhat scanty texture, and in point of quality, too, perhaps the least valuable of the eleven.
