The surface markings of the steel bars in the picture (according to the new hot-rolled ribbed steel bar standard: GB/T1499.2-2018):

“4E”——indicates the seismic steel bar grade: HRBF400 E . (Without "E", it means non-seismic steel bars)

"Y"——Manufacturer's trademark (Guangzhou Iron and Steel Co., Ltd.)

"16"——The diameter of the steel bar is 16mm

“088”——the last three digits of the production license number

Examples of relevant instructions are as follows:

Reference materials come from the Internet.