The product is a kind of neutral PEGylated liposome. Our liposomes contain three kinds of cationic, anionic and neutral subtypes. Neutral liposomes are generally non-toxic and relatively stable in serum. The one of most popular neutral liposomes on the market are Doxil®. PEG has been proven to improve the stability of liposomes and increase the circulation time of liposomes in the blood. Therefore, PEGylated liposomes have enhanced tumor permeability and retention effect (EPR) and improved tumor uptake.