As major Chinese cities take the initiative to limit the use of single-use plastics, business professionals from the catering and packaging industries are switching their attention to bio-degradable plastic products. CGTN's Li Jianhua visits the world's largest straw maker, east China's Yiwu of Zhejiang Province, which has been changing their production lines. Production of traditional plastic straws is on the decline. Instead, the company is eyeing the market of paper-made straws and those made from corn starch. And some straws the company produces are edible.