| Outcome Measures: |
Primary: Mean value of Hb levels over time, Hb will be measured throughout the period., Up to Week 52|Achievement rate for target Hb level, Percent of participants who achieved target Hb level (≥10.0 )., Up to Week 52 | Secondary: Mean Hb levels at 4 weeks after using roxadustat, Hb levels at 4 weeks after using roxadustat, At Week 4|Mean Hb levels at 8 weeks after using roxadustat, Hb levels at 8 weeks after using roxadustat, At Week 8|the dose of Roxadustat used, the dose of Roxadustat used recorded monthly, Up to Week 52|Change from baseline in Hemoglobin (Hb) levels, Change from baseline in Hemoglobin (Hb) levels was recorded monthly, Up to Week 52|the proportion of patients with different Hb levels, the proportion of patients with different Hb levels, Up to Week 52|The proportion of patients with low response to ESA, The proportion of patients with low response to ESA, Up to Week 52|Concentration of Serum iron, Serum iron will be measured throughout the period., Up to Week 52|Number of Participants with adverse events, adverse events will be record throughout the period., Up to Week 52
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