Salt and crystal form of pyrimidine compound, and preparation methods therefor

A salt of compound I:

• wherein the salt is a fumarate salt;
• wherein the salt of compound I has a molar ratio of 1:1 of compound I to fumaric acid;
• and wherein the salt is selected from:
• a crystal form A, characterized in that an XRPD pattern of the crystal form A comprises diffraction peaks at 2θ of about 5.44±0.2°, 9.75±0.2°, and/or 18.43±0.2°;
• a crystal form B, characterized in that an XRPD pattern of the crystal form B comprises diffraction peaks at 2θ of about 9.12±0.2°, 16.57±0.2°, 24.78±0.2°, and/or 25.74±0.2°;
• a crystal form C, characterized in that an XRPD pattern of the crystal form C comprises diffraction peaks at 2θ of about 9.13±0.2° and/or 26.08±0.2°;
• a crystal form D, characterized in that an XRPD pattern of the crystal form D is substantially as shown in FIG. 13;
• a crystal form F, characterized in that an XRPD pattern of the crystal form Fis substantially as shown in FIG. 16;
• and
• a crystal form G, characterized in that an XRPD pattern of the crystal form G is substantially as shown in FIG. 19.