State Key Laboratory of Lunar and Planetary Sciences;
Macau University of Science and Technology;
Taipa;
Macau;
China;
School of Physics and Astronomy;
Sun Yat-Sen University Zhuhai Campus;
Tangjia;
Zhuhai 519082;
China;
Yunnan Observatories;
Chinese Academy of Sciences;
Kunming 650216;
China;
infrared:ISM; ISM:structure; planetary nebulae:individual(M2–55 and Abell 2); stars:AGB and post-AGB;