Zhao Hai stood in the training field with a calm expression as he watched Qiu tie train. Currently, Qiu tie was using a wooden saber. However, this wooden saber was not an ordinary wooden saber. It was an Ironwood saber. It was slightly heavier than an ordinary wooden saber, but not as heavy as an iron saber. Hence, it was most suitable for Qiu tie.
The reason why Zhao Hai had not allowed Qiu tie to practice with a Metal Blade was because he was afraid that Qiu tie's body would not be able to take it. Even though Qiu tie cultivated the physical arts, he was still young, not even 10 years old. If he were to practice with a Metal Blade too early, it would not be good for him as it might harm his body. Hence, Zhao Hai had allowed him to practice with a wooden blade.
There was another reason for this. Qiu tie's saber wasn't an ordinary long saber or a Death's Head saber. He used the Guan Dao.