Many experts have suggested China learn from the experiences of countries like Japan and the United States, which have treated many PTSD cases. But the problem is that programs followed by Japan and the US may not succeed in China.

In the US, for example, governments usually offer a framework and play the instructors' role, while social organizations and non-governmental organizations (NGOs) take up the rebuilding task. Things in China are different. In China, governments at all levels have to coordinate and combine their efforts for post-disaster reconstruction. The administration thus has to lead the rescue and relief operations and reconstruction activities.

That's why the Institute of Psychology's personnel had to enlist the support of grassroots officials to make their task a success. In Wenchuan, for instance, the quake shattered the lives of grassroots officials, too. But many of them had to ignore their personal losses to perform their duty and help others. They knew pretty well what the survivors needed. So by counseling them and easing their pressure, the institute's staff members could win their support to spread their network of help.

The Institute of Psychology can boast of many successes but the greatest, as Zhang says, was to make the survivors realize the need for mental reconstruction along with material and physical reconstruction.

The treatment of PTSD patients on such a large scale is unprecedented in Chinese history. And though the central government attaches great importance to treatment of mental trauma, the subject is still not recognized as an important part of emergency relief, Zhang says.

Without a proper mechanism, survivors cannot get easy access to PTSD treatment. The ministries of Health, Civil Affairs and Education did organize rescue and relief operations which included psychological counseling, but their budgets don't make allocations exclusively for treating PTSD cases.

It is because of lack of such a mechanism that not enough professionals are trained to meet the demand in quake-ravaged areas. After the Wenchuan quake, medical teams which included psychologists were sent to the affected areas. But those psychologists were gathered from hospitals across the country and stayed there for only a short time.

Some educational institutions, especially universities, sent experts in mental therapy to the areas but they, too, stayed there only for brief periods. Besides, NGOs that can send such therapists to disaster-hit areas face budgetary problems, which is a disadvantage they cannot easily overcome.

But even if educational institutions and NGOs manage to send enough experts, they would treat survivors according to different standards for lack of an official mechanism, which may not fulfill the needs of the survivors.

So Zhang advocates setting up a national mechanism for PTSD treatment that would combine administrative and social efforts. Since the 12th Five-Year Plan (2011-2015) pays special attention to mental health of the people, Zhang also suggests making it a part of the legislation agenda.