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Definition of N Mono Grade: Polysilicon chunks or Chip Polysiliocn with purity can be used directly to produce N-Type Monocrystalline Ingots, mainly supplied Outside China by Wacker, Hemlock, OCI, and Tokuyama, as well as in China by Top Quality Chinese suppliers Definition of Mono Grade: Polysilicon chunks or Chip Polysiliocn with purity can be used directly to produce P-Type Monocrystalline Ingots, mainly supplied by Korean and Chinese Producers. Definition of PV Grade: Polysilicon chunk with high purity can be used directly to produce Solar PV Ingots/Bricks. Polysilicon Prices In China: The Prices are surveyed in Chinese Yuan (CNY) terms with Value-Added Tax (VAT) and then converted into USD terms without 13% of VAT after April 1, 2019, 16% of VAT after May 1, 2018, or 17% of VAT before May 1, 2018.