We had a big dinner last night with family friends. Finally, after many months, our turn to host. Shanghainese home cooking, so dishes were split into hot and cold dishes - one to start the meal, with the rest being cooked as we ate. I was in charge of the hot dishes, so I went out grocery shopping in the morning, shellfish and all that. Prep work started around 4 pm, and what perfect timing . . . a knife sharpening truck was making its rounds in our neighbourhood, ringing a tiny bell by the window.