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a man in a white shirt is standing in a river with the word tester on the bottom right
a man in a white shirt is standing in a river and the word tester is above him
a man wearing a jacket that says junior engineer on it sits in an office
a woman in glasses holds up a picture of a box
a man in a white shirt is standing in a river with the word tester written on the bottom
a screenshot of a program that says pragma solidity
a man with a hat and a mask is sitting in front of a laptop computer .
a poster for a professional android developer called mak d
two men are looking at a computer screen and the website gaoxiaogif.com is visible