If you are transiting from China to Canada through the Netherlands, you can usually transit directly through the Netherlands. However, whether you need a transit visa depends on your passport type and the Dutch transit policy. For most non-EU citizens, if their final destination is Canada and their stay is short (usually within 24 hours), they may not need a transit visa for the Netherlands. However, specific requirements are subject to change and it is recommended that you check with the Dutch Embassy or Consulate before traveling for the most accurate information.