I am headed to Beijing and Shanghai in a few weeks. I'm allergic to shrimp, crab and lobster. I do not speak any of the languages spoken in China. I am concerned about accidentally consuming shellfish. What's the best way to avoid shellfish? Should I print out a sign that says in Chinese "I am allergic to shrimp, crab and lobster?" Should I learn how to say this in Mandarin/Cantonese? I do not know what the literacy rates are in China and I'm concerned I'll show the sign to someone who cannot read. Any thoughts?
What do people generally bring to eat along the Great Wall? I am planning to do the Jinshanling to Simatai walk. My understanding is that there is no where to eat along this hike. What should I bring with me and where should I pick it up?
What are the best food items/stalls at the Donghuamen Night Market? This market is hardly mentioned on this board. I thought it was one of the best dining experiences in Beijing.
Finally, where are some good spots for breakfast in Shanghai and what should I order at those places?
Thank you so much for any input you can provide.