In hyperosmolar volume contraction,why there is increase in ECF osmolarity since ICF volume decreases

In hyperosmolar volume contraction,why there is increase in ECF osmolarity since ICF volume decreases,ECF volume should increase and osmolarity decrease?

Respected Sir. .so the partial compensation by water shift doesn’t have an influence on ECF osmolarity,hence both osmolarity remains high and ICF volume decreases???