It is worth noting that the Hui Yin and Violet Breath techniques are not considered traditional reiki techniques. Using them during attunements is optional, as they do not affect the outcome of the process. Nevertheless, some believe the attunements feel more powerful when these techniques are used. This is because the Hui Yin is a chi kung technique called the Microcosmic Orbit. When using this, your own chi (Reiki Energy) becomes part of the attunement process.
However, it is essential to remember that intention is the key to a successful attunement, and using these techniques should not be a cause for concern or stress. Some people find it challenging to use the Hui Yin and Violet Breath techniques during attunements, and it can complicate the process, causing them to lose focus. What is far more critical is being present in the moment, relaxed, and focused on the intention of passing on the gift of Reiki.
Therefore, it is best to focus on whether or not you are using these techniques correctly rather than focusing on the intention and energy you put into the attunement process.