It got to the point that I registered with the PSB twice a year: first before I would renew my Z visa, and once after I renewed it (so twice in one month basically). Because my registration permit would become invalid when I went on international trips, but it didn't really matter until I went to renew my visa, and then my permit would become invalid again with the new visa, so that's what I had to do.
Different PSBs in Beijing had different policies though, Haidian was looser than Chaoyang (or at least the ones I had in each, both Haidian and Chaoyang are huge and probably have multiple ones).
Before I lived in China for 9 years, I spent two years in Switzerland. You do not want to mess with the contrôle des habitants, Swiss police/officials are not very understanding. I delayed my exit from Switzerland for one week (to attend a conference) and it became a huge deal even if Americans are firmly on visa waver. Mostly the opposite of China.
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It got to the point that I registered with the PSB twice a year: first before I would renew my Z visa, and once after I renewed it (so twice in one month basically). Because my registration permit would become invalid when I went on international trips, but it didn't really matter until I went to renew my visa, and then my permit would become invalid again with the new visa, so that's what I had to do.
Different PSBs in Beijing had different policies though, Haidian was looser than Chaoyang (or at least the ones I had in each, both Haidian and Chaoyang are huge and probably have multiple ones).
Before I lived in China for 9 years, I spent two years in Switzerland. You do not want to mess with the contrôle des habitants, Swiss police/officials are not very understanding. I delayed my exit from Switzerland for one week (to attend a conference) and it became a huge deal even if Americans are firmly on visa waver. Mostly the opposite of China.