What's the name of the things in the temple that are used to throw away the locks?

That thing is called barnyard grass. (Remember to adopt your wild brother's answer. )

Throwing grain is a ritual to ask questions about Taoist beliefs, which is widely circulated in China society. "Rin" is also called "cup", so "tossing Rin" in Minnan language is also called "postscript cup"

According to the traditional custom, the content of the ceremony is to throw two half-moon cups about the size of a palm, one flat and one convex, to explore the meaning of ghosts and gods. The convex surface is "Yin" and the plane is "Yang".

The following is a description of the positive and negative combination:

One level and one convex: Call it "Holy Grail" (or "Holy Grail"), which means that the gods agree or things will go smoothly. However, if the prayer is very cautious, it will take three consecutive times to count.

Two planes: called "Laughing Cup" (or "Laughing Cup"), which means that the gods have not yet decided whether to approve or not, and their behavior is unclear. They can be thrown to the gods for instructions, or their prayers can be clarified again.

Two convex surfaces: it is called "Yin Cup" (or "Angry Cup"), which means that if the immortal doesn't agree, something will go wrong and you can submit it again for instructions.

In folk beliefs, there are several established bow throwing ceremonies as follows:

Throwing is usually limited to three times.

Before throwing a bow, you need to explain your name, birthday, address and instructions to the gods.

Before throwing the cup, put your hands together and worship the gods before putting it down.