Student or Learner
This is not required for two times inspection if this is the normal packing. After checking with the factory, they will complete the packing until today 14:00 as they cannot finished them yesterday but did not advise to us. Please help to inspect the goods till later today.
(Not a teacher)
See if this is close to what you intended:
A second inspection is not necessary for normal packing. The factory advises us that they will complete the packing today at 14:00; they were unable to complete the packing yesterday but did not advise us. Please wait until later today to help inspect the goods. [I'm not sure I got that last sentence right].