Saturday marks World Toilet Day. It's aimed at focusing more on how sanitation, or the lack of it, can impact people’s lives. Here in China, waiting to use public toilets has been an age-old problem for our women, but now authorities are looking to provide them with more facilities.

Under new rules, the ratio of female-to-male stalls will be upgraded from 1-to-1 to 3-to-2. And in especially crowded areas, women will have twice as many as men. Authorities say they are basing their ratios on a survey which involved more than 725,000 people. And the new criteria will take effect from the beginning of next month.