标题（Title） 一般不超过80个字符
Chemical trading | Chemical information | chemical suppliers | Harlan
（69 个字符）
关键词（KeyWords）一般不超过100个字符
Chemical trading,Chemical information,chemical suppliers,Harlan
（63 个字符）
描述（Description）一般不超过200个字符
Harlan mall is an ideal trading platform for domestic and foreign chemical companies. It is a chemical mall that gathers information on the supply and purchase of a large number of chemical products, including chemical reagents and other product information
（257 个字符）
