A: Zr = natural;

5 = dial 1, 5 high flowers are guaranteed;

1cf= = Call 1c, and ask your partner not to let go;

"zr5 1cf" is read together as "natural system, 1 Gaohua Baowu; Open call 1C is mandatory ".

The above is the explanation of "zr5 1cf". The "zr52cf" mentioned by the landlord may be understood as "a natural system, 1 bloom, ensuring five flowers; Open call 2C is a mandatory call ". The implication should be1c.