I once worked for GIZ, SEI, UNICEF, BMGF, SNV, BORDA, TED, etc. in China, India, Bangladesh, Pakistan, Nepal, Vietnam, Lesotho, Norway, Germany, Austria, etc. I have more than 60 publications on sanitation and I joined 20+ sanitation projects in China and global. I have joined 20+ international conference and give presentations, such as “Toilet Revolution in China: Progress and Roadmap”, “Reinvent the Toilet Challenge in China”, “Non-negligible greenhouse gas emissions from non-sewered sanitation systems”, “Development of biogas project for domestic sewage treatment in rural China: opportunities and challenges”, “First large-scale faecal sludge biogas plant in West Africa”, etc.