Scale of the challenge ahead remains unknown, experts say

Identifying the scale of a problem can be the first step in finding a solution.

When it comes to autism in China, however, specialists warn that the actual number of individuals affected by the developmental disorder, which affects communication and social interaction, is still far higher than the recorded figures.

Health experts estimate that already more than 1.6 million cases have been recognized nationwide, while another 5 million - at least - are yet to be properly diagnosed.