What did the Three Kingdoms say when they killed Sun Ce? What does it mean?

If you are unsure about domestic affairs, ask Zhang Zhao; if you are unsure about foreign affairs, ask Zhou Yu.

This means that if you have any questions about domestic management, you should go to Zhang Zhao for advice, and if you are undecided about foreign military strategy, you should go to Zhou Yu. It shows that these two people are among the best figures in Jiangdong in terms of domestic affairs and military affairs, and it also shows that Sun Ce trusts them.