The Essence

Sui Luxiao looked at Wu Long with shock.

"How..."

"Haha, it seems you have not properly relieved yourself in the past year we have been apart, so you had accumulated quite a lot of Yin Qi and since yours is very potent it allowed me to cross the threshold of the Revolving Qi Realm. It also is related that your cultivation rose from 5th to the 8th level of the Revolving Qi Realm in the time we have not seen each other"

As he chuckled and explained his rise in cultivation she slightly blushed as she looked to the side, not meeting his eyes.

"Uhm, my cultivation rise is related to meditating with the cultivation technique I used..."

The cultivation technique she was practicing was the one she received in the Frozen Garden Palace when she was a disciple there and was effective in calming down the mind. The rise in her cultivation base was actually related to the fact she meditated to bring down her anxiety, which she of course did not mention.