OA-VO1-VO2 OA: including 4 ez-medium leetcode problems VO1: discussed personal experience first, then a ez-medium leetcode problem with special background, best solution is prefix sum VO2: disscussed personal experience first, then a medium leetcode problem, best solution is backtracking

1.reach out with hr email but no coding part. 2.1st interview from beijing site, dive deep to my specific project, two medium leetcode problems 3.2 st interview form beijing site

The interview process is organized into three progressively challenging rounds: the first session focuses on problem-solving with a balanced mix of medium-difficulty and hard LeetCode questions, the second round escalates to exclusively hard-level LeetCode problems that probe algorithmic depth, while the third and final stage is a comprehensive behavioral interview assessing teamwork, communication style, and cultural fit.