No shame. SCI in the three fields is in the middle level in all papers. The level of three-zone periodicals in most fields is lower than 1 and 2. However, specific issues are treated on a case-by-case basis. Because the influence factors of some research fields are generally low, many excellent journals are also divided into three fields. Therefore, it is not shameful to graduate with a doctorate in three fields. In fact, their level is very high.