Saying goodbye to a job so often means saying goodbye to a group of people, to factories, trade shows and entire industries. In one act, signing the next contract, I move from someone who flies southwest to El Paso several times a year to someone who will probably never do that again, who will soon go months without flying domestically. After spending the first week of August in Salt Lake for a couple of years I do not go, and only realize the change from a friend’s Instagram, viewed via VPN while in Dongguan. Unlike Salt Lake, Dongguan does not have an outdoor park concert series, where I lucked into the National in twenty thirteen.

As a teacher years ago my life was driven by students’ schedules, by my contracting company, and by the needs of other teachers. In Tokyo, as in Shanghai, these requirements represented both many of my waking hours and much of my mental processes. I learned to plan lessons, to trade classes, to pull forth answers from shy but eager children, and temper the rambunctious nature of 6th graders.

These skills have come with me through the past decade to San Francisco. The people have not. Save a few, old roommates from Tokyo with whom I still adventure when able, and fellow contractors from Shanghai who likewise moved on from the profession, I no longer speak to anyone from those jobs. I do not know where those fifth or sixth graders are, who they have become. I hope amazing people, the foundation of modern Shanghai. They are after all twenty two.

Their teachers, my former colleagues, I wish well also, and hope they have received better working environments, more support, and an increase in wages. I remember wearing winter jackets in the the chill concrete rooms of that first Shanghai winter. We worked with sore fingers, all of our joints going numb as we filled out student evaluations, graded homework. From that year I have no contacts, and even the school addresses are fading, save for an elementary school on Sinan Lu.

More recently my clothing industry colleagues and vendors, from the first years of factories, remain on the periphery of life. Occasionally we find one another on LinkedIn, or in person, but mostly I walked out of that life when I moved back to the States, and my colleagues have remained where they were. The few I do keep track of have moved similarly to myself, from one industry to another until we are more at home in the strange international circle of Shanghai than in any particular company or factory. These friendships are the best parts of life, those who I have known for years and trust, whose recommendations I use in my more recent jobs. They’re who I have dinner with when alone in the city for the weekend, whose houses I stay at when booting up new production lines.

And this movement of professions continues. Just a year ago I worked closely with a man who ran an outdoor gear factory in a small Chinese city, with a metallizer outside of San Diego, and a family-run maquiladora in Juarez. In January of 2014 I spent several days measuring blankets on the floor of an Otay Mesa warehouse with a man close to my own age who had walked across the border to meet me. Each day we would have breakfast at IHOP, mostly coffee, and begin our measurements. One month later I had a new job, and our relationship passed on to a resume note, to a memory.

Moving from one city to another requires so much change. A new grocery store, a new ultimate team, a new apartment and neighborhood. Changing industries does much the same, removes the support network or renders it less valuable. By taking the new job or moving to the new town we so often say good bye to what we know and to the people we’ve worked so closely with. Passing through factory towns on my way to a new vendor in Ningbo last year I realized I probably couldn’t find the offices I used to visit in Shaoxing, Hangzhou, or Ningbo. Could no longer even recall all the products I’d come this far to source, all the weeks I had been on the road.

Crossing the Yangtze by ferry in December of twenty thirteen I knew it was probably the last time I would make that journey, and sat on the railing the whole time, trying to take it in. That’s the difference with these changes now, I remember the earlier ones and am more able to see them coming, to try and hold on to the feeling of each accidental place I will most likely never see again.