there is no simple answer to this issue, the visa regulations vary from place to place, from person to person, in principal, you can get a L visa because your wife is Chinese, but you can't stay in China for more than 180 days per entry, I mean that L visa only permits you to stay in China for 180 days at most for each entry. If your marriage lasts 5 years and annual stay duration in China is not less than 9 months, you can apply for permanent residence permit, which is valid for 5 years.