How long before the reservoir starts to move?

Migration began three to five years before the reservoir started. Reservoir resettlement can be roughly divided into three stages: first, the pre-flood treatment stage, which takes about 3-5 years or even longer; Second, the implementation stage of resettlement takes about 3-5 years; The third is to support the recovery and development of the production stage in the later stage, which lasts about 10-20 years.