It's a tyre.
EU72 & EU76 are their UHP (Ultra High Performance) line with at UTQG 280/A/A and 320/A/A respectively.
The smaller the first number, the least is going to last.
Second character is for traction, 'A' is good
Third character is for temperature, 'A' is also good
Tire pattern is not exciting, seen similar patterns with other companies.
EH22 and EH23 are their all-season tires, with UTQG 360/A/A and 400/A/A respectively.
By looking at their tire tread pattern, believe they should provide a quiet ride but UTQG a little low.
Their winter tire pattern is similar with other Chinese brand like JinYu, with impressive winter traction and quietness.
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Just a comparison,
Michelin Defender has UTQG 820/A/B with 145,000km limited warranty with Promise Plan
Continntal PureContact has UTQG 700/A/A with 110,000km limited warranty and first year and first 2/32nd road hazard warranty
Goodyear RS-A, OE tire with Honda Civic, and most Toyota Corolla with UTQG 260/A/A