Repeated Entry on L Visa

Hi, I am planning to begin an online degree at an institution based in my home country, but would like to spend most of my time in China. If I have a multiple entry L visa allowing stays of up to 90 days, is there an official limit on how many times I can exit and enter the country in one calendar year, provided I do not exceed 90 days in a single stay? I would be staying in a private apartment with a lease contract under my own name, and I would not be working or receiving any income (including overseas income) or attending a formal study course. I would like to mainly stay in China as I am going to be majoring in music and wish to learn Chinese folk instruments (attending about 4-6 hours of private tutoring per week) and independently study Chinese music and history. I have savings in China from several years of legal full-time work as well as proof of funds and assets (property) in my home country. Would I be likely to encounter problems entering if my total non-continuous stays exceeded 183 days in one year? I would likely leave the country for at least two weeks between each stay and spend around 90 days per year in my home country.