daffodilsmín yǐ shí wèi tiān (Mandarin) - people consider eating as top priority for survival. "Tian"-heaven means top priority, the most important thing.
'Tian' (heaven/heavenly) could mean top priority I agree, but surely not survival.
OK, I was mistaken about the restaurant name. It's 'Sik Wai Sin', 'sin' as in 'first'先, before anything else'. Here it is:
Camemberu - Blogging Food from Singapore, Malaysia and Japan!: Sik Wai Sin Eating House