Because they know that lacquer is the key to saving the colors of the Terracotta Warriors.

因为他们知道漆是保护兵马俑色彩的关键。

For years, an international alliance of experts from China and Germany has battled to save the Terracotta Warriors' colors.

多年来，一支由中德专家组成的国际联队致力于拯救兵马俑的色彩。