Jiao is one of the 5 concubines of the new emperor

You are her maid, who still has to test dishes for poison

at an important event, you again have to test the dish for poison, when you tried it, you immediately noticed that the silver plate had darkened a little, the usual reaction of silver to poison, but you still tried the dish for poison, and there really,was poison, you tasted the poison and then notified others that there was poison