First of all, it is necessary to determine whether the contract to be placed has been listed. For example, the iron ore contract only has a listing contract of 160 1- 12 * *, so if you enter 170 1 when placing an order, you will be prompted that the contract cannot be found.

Secondly, make sure that you have entered the wrong variety code, because even if the contract time is correct, if you enter the wrong variety code, you will be prompted that the contract cannot be found.

Finally, when some trading software trades, it is necessary to add the corresponding contract in the quotation column above in advance before trading. If there is no direct transaction, there will be such a hint.