The document discusses large scale disasters, their risk assessment, and integrated risk transfer modes in China and worldwide. It defines large scale disasters as events causing over 10,000 deaths or $1 billion in damages that affect over 100,000 square kilometers. Risk is assessed using models accounting for multiple hazards and disaster chains. China's risk transfer mode involves government support, insurance company operation, and stakeholder sharing of risk according to disaster intensity. Similar programs worldwide insure risks from earthquakes, floods, and other catastrophes.