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  <title>Yuzhao (David) Zhang — Freight &amp; logistics blog</title>
  <subtitle>Field-tested insights on freight economics, carriers, TMS and data, and practical AI—for shippers, 3PLs, and ops leaders.</subtitle>
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  <updated>2026-04-01T12:00:00Z</updated>
  <rights>Copyright © Yuzhao (David) Zhang</rights>
  <author>
    <name>Yuzhao (David) Zhang</name>
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  <entry>
    <title>Dimensional Weight Explained for Shippers: Why Light Freight Can Still Be Expensive</title>
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    <published>2026-04-01T12:00:00Z</published>
    <updated>2026-04-01T12:00:00Z</updated>
    <summary>Dimensional weight, cubic feet, divisors, and billable weight—North American parcel methodology for shippers, with a feathers-vs-rocks illustration.</summary>
  </entry>
  <entry>
    <title>Courier vs. Less-Than-Truckload: How Shippers Should Decide for Multi-Piece Shipments</title>
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    <published>2026-03-31T12:00:00Z</published>
    <updated>2026-03-31T12:00:00Z</updated>
    <summary>When courier wins, when LTL wins, and what to verify before you book—without drowning in tariff detail.</summary>
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