Triplets' struggle brings out the best in others

As the weather warms, Liu Xing is welcoming more and more customers to her grilled oyster stall at a night market in Harbin, the capital of Heilongjiang province.

"During the past two months, I have been able to earn about 300 yuan ($46) a day," said the 28-year-old.

But the money that flows in is only a fraction of what she needs for the treatment of her 4-year-old triplets.