As a subject matter expert in the field of confectionery, I can provide you with an accurate answer to your question regarding the coating on M&M's.

The outer shell of M&M's is made from a sugar coating that is applied to the chocolate center. This coating is a mixture of sugar, lecithin (an emulsifier), and carnauba wax. The lecithin helps to keep the coating smooth and shiny, while the carnauba wax gives it a glossy finish and helps to protect the candy from moisture.

Here's the answer in English, followed by the translation in Chinese, separated by "read more >>

M & M's outer candy shells are made from sugar and corn syrup, nothing more, nothing less. The candies are highly buffed by a process that gives them the look of having a shellac covering. The tasty centers are made from a mix of whole milk, cocoa butter, sugar and chocolate liquor.read more >>