In answer to the influences on food security caused by heat wave and 
drought, Professor Chen from Department of Food Safety / Hygiene and Risk Management cooperates with WUN member school from worldwide to develop stress-tolerant crops and sustainable system for production, output and safe consumption, through the knowledge in Physiology, Pathology, Breeding, Molecular Biology, Agronomy, Atmospheric Chemistry and Pollution, Food fields. Global temperatures are rising by 0.15-0.20°C per decade. A recent series of record-breaking heat waves and an increase in the incidence of drought have affected crop production worldwide. It is necessary to resolve the threat of regional and global food security caused by climate change while increasing population and decreasing cropland. The decline in crop yield and quality is mainly caused by the worldwide extreme temperature and lack of water in many regions.

Furthermore, aging is a global problem. And the comparative research about immigration and health between Taiwan, U.K and other ocean countries is also important nowadays. In 2019, the proportion of the aged population in the U.K, New Zealand, Taiwan and Malaysia are 18%, 15%, 14% and 6.7%. All these ocean countries have lots of Chinese immigrants. According to the census of the U.K in 2011, the Chinese immigrants are up to 400,000 people; the analysis data of New Zealand in 2013 shows that there are over 100 million people. Besides, the Chinese immigrants are the second largest ethnic group in Malaysia, accounting for 43.2% of the population of the Malaysian capital in 2010.

The Chinese Evergreen Associations, Elderly Associations and Religious Associations in Taiwan, the U.K, New Zealand and Malaysia provide the elders education service or friendly treatment. This study published the questionnaire at their meeting time. The cross-country comparison of Chinese elders is a new subject in the cultural research of these four ocean countries. The study could broaden the research ambit and provide a new perspective on aging to the public. After 12 months of research, it is expected to understand the characteristics, aging problems, social support status, common diseases and physiological indicators (physiological function, psychology, cognitive function) of the elderly from the U.K, New Zealand, Taiwan and Malaysia.