As Sammi Cheng (鄭秀文) feels uncomfortable when failing to differentiate purple yam and purple sweet potato, she decided to go to the market to find out the answer in the evening on 20th April. Sammi bought 3 different types at 3 different stalls and said: “#the boss is clueless too #one boss asks me if purple yam is Chinese yam #I might believe her if have weak understanding #full of curiosity #browsing the market #happy life #sorry that I forget to bring recycling bag”