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History.com[3] and the Qin dynasty's Wikipedia[2] entry date Qin Shi Huang's order to join the northern border walls into one system to around 220 BCE, without a more precise date surviving.
Confirms Qin Shi Huang's 221 BC unification of China and the subsequent construction program under his rule.[1]
States that around 220 BC, Qin Shi Huang ordered earlier fortifications joined into a single system extending more than 10,000 li.[1]
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Now, that doesn’t mean that they will invade in 2027, but certainly implies a significant milestone.
Among the allowances, state policy banks were given an additional 300 billion yuan ($44 billion) focused mainly on financing infrastructure projects. Tight rules were announced alongside the measures that require the projects to be profit-making and targeted.
Local governments were given the green light to use more than 500 billion yuan ($73 billion) of existing special bond quotas and were promised reduced financing costs through interest-rate changes.
Amid an energy crisis sparked by severe droughts and heat waves, the cabinet said central-government-run electricity firms will be allowed to sell 200 billion yuan ($29 billion) in special debt to ensure adequate energy supply.