The toll in Nepal's quake has jumped to 3,218 with 6,538 injured. UNICEF says nearly a million children "severely affected".
Four Chinese nationals, including two workers with a Chinese firm, other than a mountain climber and a tourist, were killed.
China's military has confirmed that three more senior officers are under investigation for suspected corruption.
The Japanese military could expand its role and missions around the world under new US-Japan defense guidelines.
The decline narrowed sharply from a 4.2-percent slump in the Jan-Feb period, said China's National Bureau of Statistics.
Security had already been heightened in Kuala Lumpur where leaders of the Association of Southeast Asian Nations arrived.
China's Hong Kong Special Administrative Region is expected to sign a free trade agreement (FTA) with ASEAN by 2016.
At least 18 were killed, 61 injured an avalanche triggered in Mount Everest by Nepal's quake.