The Chinese outcome was very different. It brought Sichuan within the ambit of Xia culture and so, imminently, of Chinese empire – where it would remain. For Qin, if not for Alexander, victory marked a point of no return. The conquest had doubled Qin’s territory and elevated its status from that of ‘warring state’ to warring superstate. There could be no question of relinquishing a land as rich in minerals as it was in cereals, as well served by rivers as it was by climate, and as advantageous strategically as it was economically. Rebellions were ruthlessly suppressed, and after a brief experiment in feudal dyarchy, directly administered ‘counties’ and ‘commanderies’ were carved out across the country. Qin methods of registration and recruitment were imposed, the ‘legalist’ tariff of rewards and punishments was introduced, and weights, measures and calendar were standardised. At Chengdu the massive walls, said to have been 23 metres (75 feet) high by 6.4 kilometres (4 miles) long, of a new provincial stronghold soon proclaimed Qin’s permanent intent. Compounded as usual of layered earth that had been tamped between wooden shuttering into the concrete-like hangtu, the fortifications left deep excavations, or borrow-pits, scattered about the Chengdu plain which were large enough, when flooded and stocked, to feed the city on fish. However demanding and intrusive, Qin rule was not indifferent to the welfare of the ‘black-haired commoners’; on the docility of the masses depended their mass mobilisation.
Meanwhile, across ‘Stone Cattle Road’ and other hastily constructed roadways poured pioneers from Qin’s harsher climes in the Wei and Yellow rivers – land-hungry colonists, corvée-serving conscripts, labour-sentenced convicts, mineral-seeking prospectors and career-in-crisis exiles. ‘Of all the regions [that would be] unified by Qin, Shu underwent the longest and most sustained transformation,’ writes a persuasive champion of the process.2 Comparatively undisturbed for eighty years, Qin here had a chance to field-test the policies and experiment with the projects that would characterise its all-China dominion.
The ‘land of silk and money’ lay ripe for development. In addition to linens and other fabrics, Sichuan’s vast silk output, especially of brocades, would provide both a tradeable commodity and, when packed in bales of standard weight, a convertible currency. More recognisable coinage came from the great mineral deposits to be found throughout the province and that of neighbouring Yunnan. Here ‘making money’ meant just that. Mined, minted and managed locally, copper coins, now of a more familiar and pocket-friendly shape, filled the coffers of Qin, and to judge by their ubiquity at contemporary grave sites found ready acceptance among the ancestors. Salt and iron-ore deposits were also extensively worked, both of them under state direction but with ample scope for private initiative. The salt brought in wealth; the iron was wrought into tools and weaponry.
Cereal production, the mainstay of every settled economy and the measure of its success in that it governed the availability and mobilisation of manpower, received the highest priority. Cadastral surveys were conducted, a grid of plots interspersed by paths and dykes was imposed, and much land was re-allocated. If one may judge from the scant documentation, the state even attempted to dictate what crops were planted and when. This may have applied especially to newly irrigated land; for in c. 270 BC Li Bing, as the Qin governor of Shu, conceived a means of partially diverting the Min River (one of Si-chuan’s ‘four rivers’) into the Chengdu plain.
Li Bing’s Dujiangyan system of weirs and races was extremely ambitious. The labour requirement can only be guessed at, but both deep-cutting and hill-contouring were involved, plus some bridge-building and an elaborate distribution network. ‘The largest, most carefully planned public works project yet seen anywhere on the eastern half of the Eurasian continent’, it reduced the danger of floods, provided a commercial waterway, and in time converted central Sichuan into the great rice-bowl of inland China.3 It also made Li Bing himself into a legend, and though now enveloped in the steel and concrete of later improvements, the scheme survives to this day. In fact it is a UNESCO World Heritage site. Like ‘Stone Cattle Road’, Li Bing’s Min River waterworks anticipated the later earth-moving feats of the First Emperor. But unlike them, it would be neither forgotten, like the First Emperor’s tomb, nor misconstrued, like his wall. If China had its own ‘seven wonders of the ancient world’, Li Bing’s waterworks would be one of them.
While Li Bing was busy with his sluices, Zhaoxiang, the longest-reigning king (306–251 BC) of the now resource-rich Qin, had already been flexing his new military muscle. Primed on Sichuan’s growth steroids, Qin burst from the blocks of Sichuan’s strategic location. Command of the upper Han and Yangzi valleys constituted a direct threat to any state or states based on their middle and lower reaches: and this, in the third century BC, meant the great southern state of Chu. As early as King Hui’s time, while debating the pros and cons of building ‘Stone Cattle Road’, a Qin minister had observed that of all the ‘warring states’ only Qin and Chu had the resources to prevail over the rest. By the 280s BC the pressing question was simply which had the resources to prevail over the other.
At around the time that Qin’s forces had been subduing Sichuan, Chu’s had been subduing Yue. Yue was even farther from the Yellow River and its ‘warring states’ than Sichuan. It lay south of the Yangzi delta and adjacent to Wu, a state on and about the delta itself that had been the scourge of Chu back in the sixth century BC when the marquis of Zeng had offered sanctuary to Chu’s king. Courtesy of what amounted to an interstate food chain, matters had been getting slightly simpler. Wu had been devoured by Yue in the early fifth century BC, and then Yue (including Wu) had been overrun by Chu in the late fourth century BC. Naturally if Chu (now including Yue and Wu) were to succumb to Qin, the entire Yangzi valley, including its far-reaching feeders such as the Han River, would be united. Qin would be practically invincible, two-thirds of ‘core’ China would be under its rule and, quite incidentally, an excruciating era of same-sounding states would be nearly at an end.
Well aware of the threat posed by Qin’s outflanking move into Sichuan, Chu had first tried to cobble together an anti-Qin alliance. When this failed, in c. 285 BC a Chu force thrust up the Yangzi, pillaged in Ba and Shu and then veered south into either Guizhou or Yunnan province. The geography is uncertain but the motivation is clear: to outflank the outflanker. Qin responded with a countermove that severed this Chu tentacle. Cut off in the far south-west, the Chu expeditionary force settled down among the indigenous people, and while advancing the process of casual cross-culturation, played no further part in the tug-of-war between Qin and Chu.
Seizing the moment, in 280–277 BC Qin hit back with a pincer movement involving two amphibious advances, one down the Han valley and the other down the Yangzi. The first struck deep into Hubei province and captured both the Chu capital and the ancestral tombs of its kings. The second ended Chu influence in Ba and secured the Yangzi down to below its famous gorges. Chu never recovered from these twin disasters. The loss of territory was severe, and the subsequent drift of Chu’s domain towards the coast and Shandong should be seen as less in the nature of compensation, more of dissipation. Worse was the loss of prestige and legitimacy. Deprived of his capital and unable to perform the sacrificial rites at the tombs of his ancestors, Chu’s king had clearly forfeited Heaven’s favour. In terms of moral authority as much as military clout, his state could no longer be regarded as a serious contender for supremacy.
Yet Chu would stagger on for another fifty years before finally being extinguished; nor was it