We dive deep into the subject of Emperor Qin Shi Huang's mysterious mercury river still hidden from human eyes in his undisturbed tomb. Where did all that mercury come from anyway? 

我们深入探讨秦始皇陵中神秘的水银江河，它至今仍隐藏在未被侵扰的墓穴中，不为人知。那么，这些水银到底是从哪里来的呢？